C/2019 J2 (Palomar)
{{short description|Non-periodic comet}}
{{For|other comets discovered by the Palomar Observatory|Comet Palomar}}
{{Infobox comet
| name = C/2019 J2 (Palomar)
| image = C2019 J2 2019-07-02 image ZTF-sso-876-zr-fov-4.0arcmin.png
| caption = The remnants of Comet Palomar imaged from the Zwicky Transient Facility on 2 July 2019
| discovery_ref = {{r|MPEC_2019-J123}}
| discovery_site = Palomar Observatory
| discovery_date = 27 April 2019
| designations = CK19J020
| orbit_ref = {{r|jpl}}
| epoch = 10 June 2019 (JD 2458644.5)
| observation_arc = 96 days
| obs = 312
| perihelion = 1.727 AU
| aphelion = ~1,480 AU
| semimajor = ~742 AU
| period = ~20,200 years
| eccentricity = 0.99767
| inclination = 105.14°
| asc_node = 25.468°
| arg_peri = 98.696°
| mean = 359.99°
| tjup = –0.418
| Earth_moid = 1.327 AU
| Jupiter_moid = 0.511 AU
| physical_ref = {{r|cobs_2019j2|Jewitt_2019a}}
| mean_diameter = ~{{cvt|0.4|km|mi}}
| M1 = 9.4
| M2 = 17.4
| magnitude = 14.6
{{small|(2019 apparition)}}
| last_p = 19 July 2019
| next_p =
}}
C/2019 J2 (Palomar) was a non-periodic comet that was discovered from the Palomar Observatory in April 2019. The object was reported by Quanzhi Ye as a comet on 9 May 2019 after detecting a fan-shaped tail about 10–15 arcseconds in length.{{r|MPEC_2019-J123}}
Disintegration
On 24 May 2019, the comet began to disintegrate at a distance of {{convert|1.9|AU|e6km|abbr=unit}} from the Sun, after experiencing a strong outburst nearly 56 days before reaching perihelion.{{r|Jewitt_2019a}} Further observations by the Zwicky Transient Facility between 6 and 9 July 2019 have shown that the comet lost its central condensation, indicating that its nucleus were completely destroyed.{{r|Ye_2019}} It is likely believed that strong outgassing have led to rotational disruption of its roughly {{cvt|0.4|km|mi}} nucleus, causing it to fully disintegrate a month after its initial outburst in May.{{r|Jewitt_2019a}} A similar event also occurred to 2I/Borisov a few months later.{{r|Jewitt_2019b}}
References
{{Reflist|refs=
| title= Observation list for C/2019 J2
| url= https://cobs.si/obs_list?id=1799
| website= COBS – Comet OBServation database
| access-date= 3 February 2025 }}
| author1= D. C. Jewitt
| author2= J. Luu
| title= Disintegrating In-Bound Long-Period Comet C/2019 J2
| url= https://faculty.epss.ucla.edu/~jewitt/papers/2019/JL19.pdf
| journal= The Astrophysical Journal
| year= 2019
| volume= 883
| issue= 2
| pages= L28
| bibcode= 2019ApJ...883L..28J
| arxiv= 1909.01964
| s2cid= 202538864
| issn= 2041-8205
| doi= 10.3847/2041-8213/ab4135
| doi-access= free }}
| author1= D. C. Jewitt
| author2= J. Luu
| title= Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov)
| url= https://faculty.epss.ucla.edu/~jewitt/papers/2019/JL19.pdf
| journal= The Astrophysical Journal
| year= 2019
| volume= 886
| issue= 2
| pages= L29
| bibcode= 2019ApJ...886L..29J
| arxiv= 1910.02547
| s2cid= 203837079
| doi= 10.3847/2041-8213/ab530b
| doi-access= free }}
| title= C/2019 J2 (Palomar) – JPL Small-Body Database Lookup
| url= https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2019J2
| website= ssd.jpl.nasa.gov
| publisher= Jet Propulsion Laboratory
| access-date= 4 January 2024 }}
| author1= G. V. Williams
| title= MPEC 2019-J123: Comet C/2019 J2 (Palomar)
| url= https://www.minorplanetcenter.net/mpec/K19/K19JC3.html
| website= www.minorplanetcenter.net
| publisher= Minor Planet Center
| date= 13 May 2019
| access-date= 2 February 2025
| bibcode= 2019MPEC....J..123Y }}
| author1= Q. Ye
| author2= M. S. P. Kelley
| author3= D. Bodewits
| author4= J. F. Soulier
| author5= K. Sarneczky
| author6= F. Kugel
| display-authors= 3
| title= Disintegration of Comet C/2019 J2 (Palomar)
| url= https://www.astronomerstelegram.org/?read=12931
| journal= The Astronomer's Telegram
| volume= 12931
| bibcode= 2019ATel12931....1Y }}
}}
External links
- {{JPL Small Body|id=1003623}}
{{Comets}}
{{Authority control}}
{{DEFAULTSORT:Palomar, 2019 J2}}
{{Comet-stub}}