455P/PanSTARRS
| Discovery[1] | |
|---|---|
| Discovered by | Pan-STARRS |
| Discovery site | Haleakala Observatory |
| Discovery date | 30 September 2017 |
| Designations | |
| |
| PanSTARRS 71,[2] P10E2ep | |
| Orbital characteristics[3][4] | |
| Epoch | 25 February 2023 (JD 2460000.5) |
| Observation arc | 11.03 years |
| Earliest precovery date | 21 August 2011 |
| Number of observations | 71 |
| Aphelion | 4.119 AU |
| Perihelion | 2.192 AU |
| Semi-major axis | 3.155 AU |
| Orbital period | 5.604 years |
| Inclination | 14.138° |
| 146.21° | |
| Argument of periapsis | 237.57° |
| Mean anomaly | 359.92° |
| Last perihelion | 25 February 2023 |
| Next perihelion | 1 October 2028 |
| TJupiter | 3.088 |
| Earth MOID | 1.234 AU |
| Jupiter MOID | 1.556 AU |
| Physical characteristics[5] | |
Mean radius | 0.5±0.2 km |
| Comet total magnitude (M1) | 9.4 |
455P/PanSTARRS is an Encke-type comet that completes a 5.6-year orbit around the Sun within the main asteroid belt. It is also considered an active asteroid, whose orbit suggested it may belong to the Theobalda collisional family.[6]
Observational history
[edit]Robert Weryk reported the discovery of this comet from the CCD exposures taken by the Haleakala Observatory's PanSTARRS 1 telescope on 30 September 2017, with precovery observations found as far back as 19 September of that year.[1] Following its announcement at the Minor Planet Center's PCCP report, follow-up observations from various observatories around the globe until October 2017 confirm the object's cometary nature, with an elongated coma and a fairly short tail about 10 arcseconds across.[7] Further astrometric measurements of recorded observations at the time later determined that the orbit of this new comet, previously known as P/2017 S9, is periodic with an orbital period of about 5.6 years.[8][9]
It was successfully recovered in 2022, a year ahead of its next apparition in 2023 as P/2022 R7, with precovery observations as early as 2011 were found, however with little to no cometary activity.[10] The comet later received its official numerical designation (455P) alongside eight other comets on February 2023.[11]
References
[edit]- 1 2 R. Weryk; R. N. Wainscoat; C. Wipper; et al. (October 2017). D. W. Green (ed.). "Comet P/2017 S9 (PanSTARRS)" (TXT). Central Bureau for Astronomical Telegrams. 4448: 1. Bibcode:2017CBET.4448....1W.
- ↑ "Periodic Comet Names and Designations". Planetary Data System: Small Body Node. NASA. Retrieved 4 July 2026.
- ↑ "455P/PanSTARRS – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 20 May 2025.
- ↑ "455P/PanSTARRS Orbit". Minor Planet Center. Retrieved 20 May 2025.
- ↑ H. H. Hsieh; M. Micheli; M. S. P. Kelley; M. M. Knight; N. A. Moskovitz; et al. (2023). "Observational Characterization of Main-belt Comet and Candidate Main-belt Comet Nuclei". The Planetary Science Journal. 4 (3). arXiv:2302.11689. Bibcode:2023PSJ.....4...43H. doi:10.3847/PSJ/acbdfe.
- ↑ Y. Xin; J. Shi; Y. Ma (2024). "Research of the family associations of active asteroids in the main belt". Monthly Notices of the Royal Astronomical Society. 527 (4): 10309–10334. Bibcode:2024MNRAS.52710309X. doi:10.1093/mnras/stad3883.
- ↑ H. Sato; K. Sarneczky (October 2017). D. W. Green (ed.). "Comet P/2017 S9 (PanSTARRS)" (TXT). Central Bureau for Astronomical Telegrams. 4448: 2. Bibcode:2017CBET.4448....2S.
- ↑ G. V. Williams (October 2017). D. W. Green (ed.). "Comet P/2017 S9 (PanSTARRS)" (TXT). Central Bureau for Astronomical Telegrams. 4448: 3. Bibcode:2017CBET.4448....3W.
- ↑ A. F. Tubbiolo; R. A. Mastaler; R. J. Wainscoat; et al. (28 October 2017). "Comet P/2017 S9 (PanSTARRS)". Minor Planet Electronic Circulars. 2017-U237. Bibcode:2017MPEC....U..237T. ISSN 1523-6714.
- ↑ R. Weryk; H. H. Hsieh (17 December 2022). D. W. Green (ed.). "Comet P/2022 R7 = P/2017 S9 = P/2011 Q5 (PanSTARRS)" (TXT). Central Bureau for Astronomical Telegrams. 5200: 1. Bibcode:2022CBET.5200....1W.
- ↑ D. W. Green (24 February 2023). "New Numberings of Short-Period Comets" (TXT). Central Bureau for Astronomical Telegrams. 5227: 1. Bibcode:2023CBET.5227....1.
External links
[edit]- 455P/PanSTARRS at the JPL Small-Body Database
- 455P/PanSTARRS at Seiichi Yoshida's website
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