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Topics referred to by the same term
Comet Hartley is the name of ten comets discovered by Malcolm Hartley: 79P/du Toit–Hartley 80P/Peters–Hartley 100P/Hartley or Hartley 1 103P/Hartley or
Comet_Hartley
Jupiter-family comet
Comet Hartley 2, designated 103P/Hartley by the Minor Planet Center, is a small periodic comet with an orbital period of 6.48 years. It was discovered
103P/Hartley
Topics referred to by the same term
Comet Hartley is the name of two comets discovered by Robert H. McNaught and Malcolm Hartley: X/1987 A2 (McNaught–Hartley), later rediscovered as 449P/Leonard
Comet_McNaught-Hartley
Halley-type comet
161P/Hartley–IRAS is a Halley-type comet with an orbital period of 21 years. This was one of six comets discovered by the infrared space telescope IRAS
161P/Hartley–IRAS
NASA space probe launched in 2005
EPOXI, with a dual purpose to study extrasolar planets and comet Hartley 2 (103P/Hartley). Communication was unexpectedly lost in August 2013 while the
Deep_Impact_(spacecraft)
Natural object in space that releases gas
it made a flyby of Comet Hartley 2 on 4 November 2010. Ulysses. In 2007, the Ulysses probe passed through the tail of the comet C/2006 P1 (McNaught)
Comet
Periodic comet
Comet Hartley 3 is a periodic comet with a six-year orbit around the Sun. It is one of ten comets discovered by Australian astronomer, Malcolm Hartley
110P/Hartley
Extended mission of the Deep Impact space probe
Impact spacecraft on a flyby of comet Hartley 2 on November 4, 2010, revealing a "hyperactive, small and feisty" comet, after three gravity assists from
EPOXI
Non-periodic comet
Comet Hartley–Good, formally designated as C/1985 R1, is a non-periodic comet that was observed from September 1985 to March 1986. It is the sixth comet
C/1985_R1_(Hartley–Good)
Periodic comet
Comet Hartley 1, also known as 100P/Hartley, is a Jupiter family comet with a 6.35-year orbit around the Sun. It is one of 12 comets discovered by Australian
100P/Hartley
Flight event at some distance from the object
2010, the Deep Impact spacecraft on the EPOXI mission did a flyby of comet Hartley 2. Flyby is also sometimes loosely used to describe when, for example
Flyby_(spaceflight)
Jupiter-family comet
119P/Parker–Hartley is a Jupiter-family comet with a 7.44-year orbit around the Sun. It is co-discovered by two astronomers, Quentin A. Parker and Malcolm
119P/Parker–Hartley
Periodic comet
Comet West–Hartley is a periodic comet roughly 4 km in diameter with a 7.67-year orbit around the Sun. The current orbit does not bring it closer than
123P/West–Hartley
English-born astronomer
Hartley[mælkəm hɑːtli] (born 15 February 1947, Bury, Greater Manchester) is an English-born astronomer and a discoverer of minor planets and comets,
Malcolm_Hartley
Jupiter-family comet
80P/Peters–Hartley is a Jupiter-family comet with an orbital period of 8.06 years around the Sun. It is the first of two comets discovered by German–American
80P/Peters–Hartley
Topics referred to by the same term
Look up Hartley or hartley in Wiktionary, the free dictionary. Hartley may refer to: Hartley, New South Wales Hartley, South Australia Electoral district
Hartley
Non-periodic comet
(McNaught–Hartley) is a near-parabolic long-period comet, discovered by Robert H. McNaught and Malcolm Hartley at the Siding Spring Observatory in 1999. Comet McNaught–Hartley
C/1999_T1_(McNaught–Hartley)
American planetary scientist (1940-2017)
was sent to observe comet Hartley 2. A'Hearn was also a co-investigator on Stardust-NExT mission that revisited the Tempel 1 comet after the Deep Impact's
Michael_A'Hearn
Solar system exploration program by NASA
eXtended Investigation of Comets (DIXI) mission used the Deep Impact spacecraft for a flyby mission to a second comet, Hartley 2. The goal was to take pictures
Discovery_Program
American astronomer
Wide-field Infrared Survey Explorer mission. His analysis of the images of comet Hartley 2 taken by the WISE spacecraft revealed that the object was shedding
James_Bauer_(astronomer)
Periodic comet with 5 year orbit
79P/du Toit–Hartley or du Toit 2 is a periodic comet, now divided into two parts, in the Solar System with an orbital period of 5.06 years. Its most recent
79P/du_Toit–Hartley
Europan atmosphere sampler aboard NASA's Clipper
Discovery program missions: Enceladus Life Finder (ELF), comet Hartley 2 (PRIME), and to the main belt comet Read (Proteus). It also has applications for probes
Mass Spectrometer for Planetary Exploration
Mass_Spectrometer_for_Planetary_Exploration
Periodic comet
linked 449P with the previously lost comet, X/1987 A2, which was discovered by Robert H. McNaught and Malcolm Hartley from the Siding Spring Observatory
449P/Leonard
Central part of a comet
The nucleus is the solid, central part of a comet, formerly termed a dirty snowball or an icy dirtball. A cometary nucleus is composed of rock, dust,
Comet_nucleus
Astronomic observatory in New South Wales, Australia
at Siding Spring. Comets discovered from the observatory include Comet 103P/Hartley, discovered in 1986 by Malcolm Hartley, Comet C/2006 P1, discovered
Siding_Spring_Observatory
Canadian-American astronomer and writer (born 1948)
discovery) Comet Hartley-IRAS (P/1983 V1), November 30, 1983 (independent discovery) Comet Shoemaker 1992y, C/1992 U1 (aided in discovery) Periodic Comet Shoemaker
David_H._Levy
Halley-type comet and parent body of the Perseid meteors
Comet Swift–Tuttle (formally designated 109P/Swift–Tuttle) is a large periodic comet with a 1995 (osculating) orbital period of 133 years that is in a
Comet_Swift–Tuttle
solar system exploration. These events were: Deep Impact's flyby of comet Hartley 2, the arrival of Dawn to asteroid Vesta, the launch of the Mars Science
Year_of_the_Solar_System
Periodic comets numbered by the Minor Planet Center
numbered comets (1P–513P). There are 441 Jupiter-family comets (JFCs), 50 Encke-type comets (ETCs), 15 Halley-type comets (HTCs), five Chiron-type comets (CTCs)
List_of_numbered_comets
ESA space telescope in service 2009–2013
Nature states that Herschel's measurements of deuterium levels in the comet Hartley 2 suggests that much of Earth's water could have initially come from
Herschel_Space_Observatory
Great Comet of 2020
C/2020 F3 (NEOWISE) or Comet NEOWISE is a long period comet with a near-parabolic orbit discovered on March 27, 2020, by astronomers during the NEOWISE
Comet_NEOWISE
Sri Lankan born planetary scientist
another far off Asteroid Lankan astronomer’s voyage of discovery with Comet Hartley 2 Celestial honour for Lankan astronomer Nalin Samarasinha "MPC/MPO/MPS
Nalin_Samarasinha
NASA/ESA solar probe launched in 1990
1994/1995, 2000/2001, and 2007/2008. In addition, the probe studied several comets. Ulysses was a joint venture of the European Space Agency (ESA) and the
Ulysses_(spacecraft)
Topics referred to by the same term
319P/Catalina-McNaught (P/Catalina-McNaught 2008 S1, 2008 JK) Comet McNaught-Hartley, any of: 318P/McNaught-Hartley (P/1994 N2, P/2014 M6, 1994 XXXI, 1994n) X/1987
Comet McNaught (disambiguation)
Comet_McNaught_(disambiguation)
Group of rare meteorites
isotopes, and deuterium/hydrogen ratios similar to those measured in Comet Hartley 2. Further evidence comes from reconstructed orbital and atmospheric
CI_chondrite
carry a payload to search for past extraterrestrial life on Mars. Asteroid, comet, and lunar proposals Binary Asteroid in-situ Explorer (BASiX)— a mission
Selection of Discovery Mission 13 and 14
Selection_of_Discovery_Mission_13_and_14
South African astronomer
discovered and co-discovered several comets, including 57P/du Toit–Neujmin–Delporte, 66P/du Toit, 79P/du Toit–Hartley. He worked at Boyden Observatory Maselspoort
Daniel_du_Toit
Topics referred to by the same term
76P/West–Kohoutek–Ikemura 123P/West–Hartley C/1978 A1 (West) This disambiguation page lists articles associated with the title Comet West. If an internal link incorrectly
Comet_West_(disambiguation)
Index of articles associated with the same name
Comet du Toit may refer to any of the five comets discovered by South African astronomer, Daniel du Toit, below: 57P/du Toit–Neujmin–Delporte 66P/du Toit
Comet_du_Toit
Small Solar System body with an orbit that can bring it close to Earth
Deep Impact flew by the near-Earth comet 103P/Hartley. In August 2014, ESA probe Rosetta began orbiting near-Earth comet 67P/Churyumov–Gerasimenko, while
Near-Earth_object
Scottish-Australian astronomer (born 1956)
following comets: P/Catalina-McNaught (a.k.a. P/2008 S1, 2008 JK) P/McNaught-Hartley (a.k.a. P/1994 N2, 1994 XXXI, 1994n) Comet McNaught-Hartley (a.k.a.
Robert_H._McNaught
Town in New South Wales, Australia
south-east of Hartley, is the site of the historic home Rosedale. Hartley Vale, situated 6 kilometres (3.7 mi) east of Hartley, is the site of the Comet Inn, Collits
Hartley,_New_South_Wales
Cosmic dust that originates from a comet
Comet dust is cosmic dust that originates from a comet. Comet dust can provide clues to comets' origin. When the Earth passes through a comet dust trail
Comet_dust
a total of 8 comets have been visited by spacecraft. These were the comets Halley, Borrelly, Giacobini–Zinner, Tempel 1, Wild 2, Hartley 2, Grigg–Skjellerup
Observational history of comets
Observational_history_of_comets
The following tables list all minor planets and comets that have been visited by robotic spacecraft. A total of 21 minor planets (asteroids, dwarf planets
List of minor planets and comets visited by spacecraft
List_of_minor_planets_and_comets_visited_by_spacecraft
Comets with a period of over 1,000 years
long-term orbit. List of comets by type List of numbered comets List of periodic comets List of Halley-type comets List of long-period comets List of parabolic
List_of_near-parabolic_comets
American astrophysicist
radiation. He was part of the team that determined that ice on the comet 103P/Hartley (Hartley 2) has the same chemical composition as the oceans of Earth and
Edwin_Bergin
Jupiter-family comet
Tempel 1 (official designation: 9P/Tempel) is a Jupiter-family comet discovered by Wilhelm Tempel in 1867. It completes an orbit of the Sun every 5.6
Tempel_1
Comets with a period between 200 and 1000 years
The following list is of comets with very long orbital periods, defined as between 200 and 1000 years. These comets come from the Kuiper belt and scattered
List_of_long-period_comets
2021 American film by Adam McKay
attempting to warn humanity about an approaching comet that will destroy human civilization. The movie's central comet impact event was used by McKay as an allegory
Don't_Look_Up
Comet which was not detected during its most recent perihelion passage
A lost comet is one which was not detected during its most recent perihelion passage. This generally happens when data is insufficient to reliably calculate
Lost_comet
Small Solar System body that is composed of two bodies
evidence of a contact binary comet nucleus. Later radar imaging and spacecraft exploration of the Jupiter family comet 103P/Hartley in 2010 also revealed a
Contact binary (small Solar System body)
Contact_binary_(small_Solar_System_body)
Town in New South Wales, Australia
Hartley Vale is a small village in the Blue Mountains area of New South Wales, Australia. It is approximately 150 kilometres west of Sydney and 12 kilometres
Hartley_Vale
Jupiter-family comet
Comet 81P/Wild, also known as Wild 2 (pronounced "vilt two") (/ˈvɪlt/ VILT), is a comet with a period of 6.4 years named after Swiss astronomer Paul Wild
81P/Wild
Periodic comet
Jupiter-family comet discovered by Charles T. Kowal in 1979. The orbit was confirmed after new sightings in 1991 and 1998. By July 2027, the comet should be
104P/Kowal
Australian children's television show
that they are mermaids. The girls learn that Earth is in the path of a comet that could destroy the planet. They try to think of a plan to stop the catastrophe
H2O:_Just_Add_Water
Non-periodic comet
"TRAPPIST bright comets production rates: C/2023 P1 (Nishimura), C/2023 E1 (ATLAS), C/2020 V2 (ZTF), C/2022 A2 (PANSTARRS), 103P/Hartley, 2P/Encke, and
C/2020_V2_(ZTF)
Clan feud in the United States
Anne Hartley Greene 1700-1970. Pineville, Louisiana: Claude Greene. p. 20. Greene, Alton Lee (1970). Greene Family Tree of Jeremiah and Anne Hartley Greene
Greene–Jones_War
Hypotheses for the possible sources of the water on Earth
ratio three times that of Earth's seawater. Another Jupiter family comet, 103P/Hartley 2, has a D/H ratio which is consistent with Earth's seawater, but
Origin_of_water_on_Earth
Missions to comets includes list of spacecraft that were launched to study comets. As of 2026, there have been twelve missions from United States, the
List_of_missions_to_comets
Periodic comet
Groussin; P. Lamy; L. Jorda; I. Toth (2004). "The nuclei of comets 126P/IRAS and 103P/Hartley 2" (PDF). Astronomy & Astrophysics. 419 (1): 375–383. Bibcode:2004A&A
126P/IRAS
Lost comet
Comet Boethin (officially 85D/Boethin) was a periodic Jupiter-family comet discovered in 1975 by Leo Boethin. It appeared again in January 1986 as expected
85D/Boethin
Periodic comet with 8 year orbit
160P/LINEAR is a periodic comet in the Solar System. The comet came to perihelion on 18 September 2012, and reached about apparent magnitude 17. Diagram
160P/LINEAR
Parabolic comet
a non-periodic comet discovered by LINEAR on 16 December 2000. The comet brightened to an apparent magnitude of about 2.5. The comet was discovered on
C/2000_WM1_(LINEAR)
Infrared space observatory
shower), six comets, and a huge dust trail associated with comet 10P/Tempel. The comets included 126P/IRAS, 161P/Hartley–IRAS, and comet IRAS–Araki–Alcock
IRAS
Periodic comet
Jupiter-family comet with an orbital period of 5.3 years. It was discovered in images obtained on 10 October 2004 as part of the Siding Spring Survey. The comet was
162P/Siding_Spring
Non-periodic comet
A2 (LINEAR) is a non-periodic comet from the Oort cloud discovered by LINEAR on 15 January 2001. The nucleus of comet split in multiple fragments during
C/2001_A2_(LINEAR)
Periodic comet
known as Mueller 1, is a Jupiter-family comet with an 8.4-year orbit around the Sun. It is one of 15 comets discovered by American astronomer, Jean Mueller
120P/Mueller
American convicted murderer (born 1991)
Retrieved January 2, 2024. "Local girl to serve as queen for a day". Daily Comet. February 24, 2001. Archived from the original on August 24, 2016. Watson
Gypsy-Rose_Blanchard
Periodic comet
99P/Kowal, also known as Kowal 1, is a periodic comet in the Solar System that orbits out by Jupiter and has a 15 year orbital period. It has been observed
99P/Kowal
Danish astronomer (born 1941)
discovered numerous comets, including Comet West (C/1975 V1), which was one of the brightest comets of the 1970s, and the periodic comets 76P/West–Kohoutek–Ikemura
Richard_Martin_West
Periodic comet
Marsden (ed.). "Comet Bus (1981b)". IAU Circular. 3581 (2). Bibcode:1981IAUC.3581....2S. ISSN 0081-0304. S. J. Bus; K. S. Russell; M. Hartley (10 March 1981)
87P/Bus
Robert Quinn of Franklin Park, Illinois at a nearby auto parts store called Comet Auro Parts, 40-year-old Clem "Clemmie" Henderson entered Moses Montefiore
List of school shootings in the United States (before 2000)
List_of_school_shootings_in_the_United_States_(before_2000)
Isotope of hydrogen with one neutron
measurement of deuterium amounts of 161 atoms per million hydrogen in Comet 103P/Hartley (a former Kuiper belt object), a ratio almost exactly that in Earth's
Deuterium
'71) Look to the Land (Twentieth Century Fund); John Barnes & Robert W. Hartley; camera: Haskell Wexler & Louis Clyde Stoumen & Gordon Weisenborn color
List of Encyclopædia Britannica Films titles
List_of_Encyclopædia_Britannica_Films_titles
1945 British experimental aircraft
designs, particularly the DH.106 Comet which had initially been considered a tailless, swept-wing concept. Despite the Comet design taking on more conventional
De_Havilland_DH_108
Jupiter-family comet
a Jupiter-family comet discovered by astronomers Carolyn and Eugene M. Shoemaker and David Levy. During the 2010 apparition the comet became as bright
118P/Shoemaker–Levy
Apollo asteroid
closer and slower than the Hartley 2 flyby (which was at 700 kilometers and 12 kilometers per second). Asteroid and Comet Mission Targets Observed by
(163249)_2002_GT
later confirmed to begin on August 4. May 1 – NWA Powerrr premiered on Comet, after airing on The Roku Channel since July 2025. This put the National
2026 in professional wrestling
2026_in_professional_wrestling
Periodic comet
101P/Chernykh is a periodic comet which was first discovered on 19 August 1977, by Nikolaj Stepanovich Chernykh. This comet is orbiting the Sun at a distance
101P/Chernykh
Periodic comet
111P/Helin–Roman–Crockett is an Encke-type comet with an 8.46-year orbit around the Sun. It was co-discovered by Eleanor and Ron Helin, Brian P. Roman
111P/Helin–Roman–Crockett
Jupiter-family comet
276P/Vorobjov (previously P/2012 T7 (Vorobjov)) is a Jupiter-family comet discovered on 15 October 2012 by Tomáš Vorobjov on three 120-s images taken
276P/Vorobjov
Jupiter-family comet
is a Jupiter-family comet roughly 8 km in diameter with a current orbital period of 7.2 years. It is the second periodic comet discovered by American
78P/Gehrels
Lawless as Isabelle Hartley in the second season, the executive producers considered establishing a relationship between Hand and Hartley, since the comic
List of Agents of S.H.I.E.L.D. characters
List_of_Agents_of_S.H.I.E.L.D._characters
Jupiter-family comet
60P/Tsuchinshan, also known as Tsuchinshan 2, is a Jupiter-family comet with an orbital period of around 6.63 years. Tsuchinshan is the Wade-Giles transliteration
60P/Tsuchinshan
Synopsis Astronomia Cometicae, states that comets seen in 1456, 1531, 1607, and 1682 were actually a single comet and correctly predicts that it will return
1705_in_science
Musical artist
Artwoods". The Independent. Retrieved 27 February 2008. Staff (23 November 2006). "Art Wood: Musician and artist". Surrey Comet. Retrieved 28 April 2024.
Art_Wood
Social network cyberbullying phenomenon
Portuguese). 7 April 2017. Archived from the original on 22 April 2017. Hartley-Parkinson, Richard (28 February 2017). "Teenagers are taking their own
Blue_Whale_Challenge
caring pink rabbit who is into surfing and lives with her closest friend Comet and other friends on the Frosty Star space station smoothie diner. Hare-ham
List of fictional rabbits and hares
List_of_fictional_rabbits_and_hares
Halley-type comet
122P/de Vico is a Halley-type comet with an orbital period of 74 years. It was discovered by Francesco de Vico in Rome on 20 February 1846. It is expected
122P/de_Vico
Jupiter-family comet
102P/Shoemaker, also known as Shoemaker 1, is a Jupiter-family comet with a 7.47-year orbit around the Sun. It was first seen in 1984, and then again
102P/Shoemaker
(2009). "Spitzer Space Telescope Observations of the Nucleus of Comet 103P/Hartley 2". Publications of the Astronomical Society of the Pacific. 121 (883):
List of Solar System objects by size
List_of_Solar_System_objects_by_size
was later active on Thanagar. Captain Comet Adam Blake Made honorary in DC Special #27 Active in adventuring. Comet is appointed an honorary member by Hawkman
List of Justice League members
List_of_Justice_League_members
American detective television series (1967–1975)
were: Season one – 1966 Mercury Comet Caliente convertible (pilot episode: "The Name Is Mannix"), 1967 Mercury Comet Cyclone convertible (one episode
Mannix
at University College London 23 February 2006 Catherine the Great Janet Hartley, Professor of International History at the London School of Economics Simon
List of In Our Time programmes
List_of_In_Our_Time_programmes
Award for best Broadway musical
Friedman Productions, Jujamcyn Theaters, et al. Natasha, Pierre & The Great Comet of 1812 Book, Music, & Lyrics by Dave Malloy Howard and Janet Kagan, Carole
Tony_Award_for_Best_Musical
Canadian professional ice hockey winger
skate blade during a game". Associated Press. Retrieved November 14, 2023. Hartley, Joshua (October 30, 2023). "Official police statement after death of Nottingham
Matt_Petgrave
Off-off-Broadway Thomas Tierney Ted Drachman Jules Tasca Natasha, Pierre & The Great Comet of 1812 2016 Broadway Dave Malloy Malloy Malloy Electropop opera, Based
List_of_musicals:_M_to_Z
Global warming about 55 million years ago
orbital trigger for the hyperthermal. One theory holds that a 12C-rich comet struck the earth and initiated the warming event. A cometary impact coincident
Paleocene–Eocene thermal maximum
Paleocene–Eocene_thermal_maximum
Class of units of measurement for explosive energy
BBC Science Focus Magazine. September 2, 2017. Retrieved April 23, 2022. "Comet/Jupiter Collision FAQ – Post-Impact". www.physics.sfasu.edu. Archived from
TNT_equivalent
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