157P/Tritton
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157P/Tritton is a periodic comet with a 6-year orbital period. Fragment B was first observed on 21 August 2022.[1]
Observational history
Keith Tritton (U. K. Schmidt Telescope Unit, Coonabarabran) discovered this comet on a deep IIIa-J exposure made with the 122-cm Schmidt telescope on 1978 February 11.66.[2]
The comet was not detected during the predicted returns of 1984, 1990 or 1996 and was presumed lost. However, on 2003 October 6.44, using CCD images obtained with a 0.12-m refractor, C. W. Juels (Fountain Hills, Arizona, USA) and P. Holvorcem (Campinas, Brazil) detected a comet that proved to be on a similar orbit to the lost comet. B. G. Marsden was able to calculate a new orbit, published in IAU Circular No. 8215, issued 2003 October 7, which confirmed that it was indeed identical to comet Tritton.[2]
The comet was also recovered at its 2010, 2016, and 2022 apparitions. On 2 October 2022 the discovery of a new fragment of the comet was published in MPEC 2022-T23.[1] With a smaller orbit, fragment B should come to perihelion in 2028 March[3] and the primary fragment should come to perihelion in 2029 May[4] (Template:Time interval later).
| Component | Period (years) |
Perihelion |
Aphelion (AU) |
Semi-major axis (AU) |
Eccentricity | Inclination | Next Perihelion |
|---|---|---|---|---|---|---|---|
| 157P[5] | 6.68 | 1.572 | 5.519 | 3.545 | 0.5566 | 12.42° | 2029-May-18[4] |
| 157P-B[6] | 5.49 | 1.552 | 4.671 | 3.111 | 0.5012 | 12.43° | 2028-Mar-07[3] |
References
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 157P/Tritton – Seiichi Yoshida @ aerith.net
- 157P at Gary W. Kronk's Cometography
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