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177P/Barnard
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Halley-type comet
July 2026
other comets of the same name Comet Barnard
177P/Barnard Barnard_1889 Edward Emerson Barnard Lick Observatory 24 June 1889 P/1889 M1P/2006 M3 Barnard 2nasa-pds 1889 III, 1889cICQ1 jpldata MPC 21 November 2025 (JD 2461000.5) 117.47 yearsobs_arc 1,911 1.125 AU 47.848 AU 24.502 AU 0.95408 ~121 years 30.959° 271.59° 61.043° 57.092° 1.317 0.310 AU 0.349 AU 15.7 18.3 28 August 2006 13 April 2127NK1369 Horizons2127
Comet 177P/Barnard, also known as Barnard 2, is a Halley-type comet with an orbital period of 122 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years). It orbits near the ecliptic plane and has aphelion near the Kuiper cliff at 48 AU e9km unit on.
Observational history
The comet, also designated P/2006 M3, was discovered by Edward Emerson Barnard on 24 June 1889, and was re-discovered after 116 years.Naoyuki Kurita Stellar Scenes Comet Barnard 2 on Aug 4, 2006 http://www.ne.jp/asahi/stellar/scenes/comet_e/barnard2_060804.htm 2006-09-01 dead https://web.archive.org/web/20070930224943/http://www.ne.jp/asahi/stellar/scenes/comet_e/barnard2_060804.htm 2007-09-30 On July 19, 2006, 177P came within 0.366 AU e6km unit on of Earth.Kazuo Kinoshita 2006-11-18 177P/Barnard http://jcometobs.web.fc2.com//pcmtn/0177p.htm 2007-01-06 From late July through September 2006 it was slightly brighter than expected at 8th magnitude in the constellations Hercules and then Draco. Perihelion was August 28, 2006. It was last observed in December 2006 when it was about 2 AU e6km unit from the Sun.
The only numbered comets with an orbital period longer than 177P/Barnard are: 153P/Ikeya–Zhang (365 years), 273P/Pons–Gambart (188 years), 35P/Herschel–Rigollet (155 years), and 109P/Swift-Tuttle (133 years).
Of Barnard's other two periodic comets, the first, D/1884 O1 (Barnard 1) was last seen on November 20, 1884, and is thought to have disintegrated. The last, 206P/Barnard–Boattini marked the beginning of a new era in cometary astronomy, as it was the first to be discovered by photography. It was a lost comet after 1892, until accidentally rediscovered on 7 October 2008, by Andrea Boattini.
Meteor shower
A 2011 study proposed that 177P/Barnard may have been one of two progenitor bodies of the Kappa Cygnids meteor shower alongside C/1905 F1 (Giacobini).Tikhomirova_2011 However, orbital reconstructions show that it is more associated with the asteroid 361861 (2008 ED 69) instead.Jenniskens_2008
Notes
"obs_arc" Observation arc from the Minor Planet Center database covering dates from 24 June 1889 until 11 December 2006.
References
E. E. Barnard Discovery and Observations of Comet 1889...(Barnard June 23) Astronomische Nachrichten 1889 122 115 1889AN....122R.115B
Comet Names and Designations http://www.icq.eps.harvard.edu/names1.html International Comet Quarterly 2026-07-03
P. Jenniskens J. Vaubaillon Minor Planet 2008 ED 69 and the Kappa Cygnid Meteor Shower The Astronomical Journal 2008 136 2 725–730 2008AJ....136..725J 10.1088/0004-6256/136/2/725 free
177P/Barnard – JPL Small-Body Database Lookup https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=177P ssd.jpl.nasa.gov Jet Propulsion Laboratory 2012-07-26
177P/Barnard Orbit http://www.minorplanetcenter.net/db_search/show_object?object_id=177P Minor Planet Center 2014-06-20
Periodic Comet Names and Designations https://pds-smallbodies.astro.umd.edu/data_sb/resources/periodic_comets.shtml Planetary Data System: Small Body Node NASA 2026-07-03
E. N. Tikhomirova To the problem of meteoroid stream research Yaroslavskij Pedagogicheskij Vestnik 2011 3 3 28–33 2011YarPV...3c..28T
Horizons Batch for 177P/Barnard on 2127-Apr-13
JPL Horizons
Perihelion occurs when rdot flips from negative to positive
https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27177P%27&START_TIME=%272127-Apr-11%27&STOP_TIME=%272127-Apr-15%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
2023-04-29 (JPL#29/Soln.date: 2021-Apr-15)
177P/Barnard 2
Seiichi Yoshida (calculated by Kazuo Kinoshita)
http://aerith.net/comet/catalog/0177P/index.html
https://web.archive.org/web/20110427032324/http://aerith.net/comet/catalog/0177P/index.html
27 April 2011
live
2011-03-15
2006-10-01
177P/Barnard 2 (NK 1369)
OAA Computing and Minor Planet Sections
Syuichi Nakano
Syuichi Nakano
http://www.oaa.gr.jp/~oaacs/nk/nk1369.htm
2012-02-20
External links
1000909
177P 177P/Barnard at the Minor Planet Center database
177P/Barnard at Kazuo Kinoshita's website
177P/Barnard at Gary W. Kronk's Cometography
176P/LINEAR 178P/Hug-Bell
Category:Periodic comets
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