Comets in 2011

short-period comet

non-periodic comet

73P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 3 or SW3 for short, is a periodic comet that has a 5.4 year orbital period and that has been actively disintegrating since 1995. When it came to perihelion (closest approach to the Sun) in March 2017, fragment 73P-BT was separating from the main fragment 73P-C. Fragments 73P-BU and 73P-BV were detected in July 2022. The main comet came to perihelion on 25 August 2022, when the comet was 0.97 AU from the Sun and 1 AU from Earth. It will be less than 80 degrees from the Sun from 25 May 2022 until August 2023. On 3 April 2025 it made a

Kreutz Sungrazer comet discovered in November 2011 by Terry Lovejoy

Comet Crommelin, also known as Comet Pons-Coggia-Winnecke-Forbes, is a periodic comet with an orbital period of almost 28 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years). It is named after the British astronomer Andrew C. D. Crommelin who calculated its orbit in 1930. It is one of only five known comets that are not named after their discoverer(s) It next comes to perihelion (closest approach to the Sun) around 27 May 2039 when it will be near a maximum near-perihelion distance from Earth.

45P/Honda–Mrkos–Pajdušáková is a short-period comet discovered by Minoru Honda December 3, 1948. It is named after Minoru Honda, Antonín Mrkos, and Ľudmila Pajdušáková. The object revolves around the Sun on an elliptical orbit with a period of 5.25 years. The nucleus is 1.3 kilometers in diameter. On August 19 and 20, 2011, it became the fifteenth comet detected by ground radar telescope.

41P/Tuttle–Giacobini–Kresák is a Jupiter-family comet with a 5.43-year orbit around the Sun. Observations with the Hubble Space Telescope and dynamical modeling estimate an effective nucleus radius of , corresponding to a diameter of roughly , smaller than earlier ground-based estimates.

36P/Whipple is a periodic comet in the Solar System. It is the lowest numbered Quasi-Hilda comet. It passed from Jupiter in June 1922.

37P/Forbes is a periodic comet in the Solar System. The orbit of this comet passes close to the planet Jupiter however it orbit changes frequently. It was discovered on August 1, 1929, by Alexander F. I. Forbes in South Africa. The comet nucleus is estimated to be in diameter.

49P/Arend–Rigaux is a periodic comet with a 6.75-year orbit around the Sun. It is the first of three comets discovered by Belgian astronomer Sylvain Arend and the only one for Fernand Rigaux.

48P/Johnson is a periodic comet in the Solar System.

130P/McNaught–Hughes is a Jupiter-family comet with a 6.22-year orbit around the Sun. It is the second of two comets co-discovered by Robert H. McNaught and Shaun M. Hughes.

322P/SOHO is the first periodic comet to be discovered using the automated telescopes of the Solar and Heliospheric Observatory (SOHO) spacecraft, and second to be given a numbered designation, after 321P/SOHO. At perihelion, it is six times closer to the Sun than the planet Mercury.

Comet Taylor, also known as 69P/Taylor, is a Jupiter-family comet with a 7.64-year orbit around the Sun. It is the only comet discovered by South African astronomer, Clement Jennings Taylor.

{| class=wikitable style="text-align:center; font-size:11px; float:right; margin:2px" |- bgcolor= style="font-size: smaller;" | colspan="8" style="text-align:center;"|Perihelion distanceat different epochs |- ! Epoch !! Perihelion(AU) |- | 1800 || 2.45 |- | 1859 || 2.11 |- | 1882 || 2.04 |- | 1905 || 1.96 |- | 1965 || 1.49 |- | 2011 || 1.38 |- | 2023 || 1.26 |- | 2036 || 1.36 |- | 2094 || 1.21 |- | 2106 || 1.15 |}

Comet Maury, also known as 115P/Maury, is a Jupiter-family comet with an 8.83-year orbit around the Sun. It is the first of nine comets discovered by French astronomer, Alain J. Maury.

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.

97P/Metcalf–Brewington is a periodic Jupiter-family comet originally discovered by Joel H. Metcalf in 1906 but subsequently lost. A new observation in 1991 by Howard J. Brewington was matched to the 1906 sighting; the orbit was computed and the comet was observed again on its returns to perihelion in 2001, 2011, and 2022.

71P/Clark is a periodic comet in the Solar System with an orbital period of 5.5 years.

Comet West–Hartley is a periodic comet with a 7.67-year orbit around the Sun.

astronomical object

comet

246P/NEAT is a periodic comet discovered on 2004 March 28 by Near-Earth Asteroid Tracking (NEAT) using the reflector at Haleakala. It was given the permanent number 246P on 14 January 2011.

243P/NEAT is a periodic comet currently with a 7.49-year orbit around the Sun.