15P/Finlay
Semi-major axis 3.488 AU | | |
Eccentricity | 0.7202 | |
---|---|---|
Orbital period | 6.51 a | |
Inclination | 6.799° | |
Last perihelion | July 13, 2021[1] December 27, 2014[1][2] June 22, 2008 | |
Next perihelion | 2028-Feb-09[3] 2034-Sep-08 2041-Apr-03 2047-Oct-25 2054-May-02 2060-Oct-03[4] | |
Earth MOID | 0.009 AU (1.3 million km)[5] | |
Jupiter MOID | 0.16 AU (24 million km)[5] | |
Physical characteristics | ||
Dimensions | 1.8 km (uncertain)[6] |
Comet Finlay is a
Description
Perihelion distance at different epochs[1] | |||||||
Epoch | Perihelion )
(AU | ||||||
---|---|---|---|---|---|---|---|
1866 | 1.0 | ||||||
1906 | 0.96 | ||||||
1919 | 1.0 | ||||||
1981 | 1.1 | ||||||
2008 | 0.97 | ||||||
2021 | 0.99 | ||||||
2028 | 1.0[3] |
When the first orbit calculations were made in 1886, there was a similarity between this orbit and that of
During the 1906 apparition the comet brightened to magnitude 6. In 1910 a close pass with Jupiter increased the orbital period, in 1919 the path was off predictions and a new comet discovered by Sasaki (Kyoto Observatory, Japan) on October 25, 1919, was discovered to be Finlay's.
The magnitude of the comet declined after 1926, and it was not until 1953 that it has been observed on every return.
2014–2015
During the 2014 perihelion passage the comet outburst on 16 December 2014 from magnitude 11 to magnitude 9 becoming bright enough to be seen in common
2060
15P/Finlay currently has an Earth-MOID of 0.009 AU (1,300,000 km; 840,000 mi).[5] The comet will come to perihelion six more times and then on October 22, 2060, the comet will pass roughly 0.0334 AU (5.00 million km; 3.10 million mi) from Earth with an uncertainty region of about ±2300 km.[5][12] This will be one of the closest comet approaches to Earth.[13]
Arids meteor shower
Debris ejected during the 1995 perihelion passage generated a meteor shower on 29–30 September 2021 radiating from the southern constellation of Ara.[14] More outbursts are expected on 7 October 2021 from the 2008 and 2014 streams.
References
- ^ a b c "15P/Finlay Orbit". Minor Planet Center. Retrieved 2014-06-21.
- ^ Syuichi Nakano (2011-11-05). "15P/Finlay (NK 2161)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
- ^ a b "Horizons Batch for 15P/Finlay (90000257) on 2028-Feb-09" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2022-06-16. (JPL#K213/16 Soln.date: 2022-Mar-09)
- ^ "Horizons Batch for 15P/Finlay (90000257) on 2060-Oct-03" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2022-06-16. (JPL#K213/16 Soln.date: 2022-Mar-09)
- ^ a b c d "JPL Close-Approach Data: 15P/Finlay" (last observation: 2022-03-03). Archived from the original on 2017-02-20. Retrieved 2022-06-16.
- ISBN 978-0-8165-2450-1.
- ^ a b Seiichi Yoshida (2016-06-11). "15P/Finlay". Seiichi Yoshida's Comet Catalog. Retrieved 2020-07-20.
- ^ "JPL Small-Body Database Search Engine: numbered comets". JPL Solar System Dynamics. Retrieved 2020-07-27.
- ^ Kronk, Gary W. "15P/Finlay". Cometography. Retrieved 2007-01-31.
- ^ a b Bob King (2014-12-18). "Comet Finlay in Bright Outburst, Visible in Small Telescopes". Universe Today. Retrieved 2014-12-20.
- ^ Michael Mattiazzo. "24324Re: [comets-ml] Re: Possible another outburst of 15P/Finlay?". Yahoo: comet-ml. Archived from the original on January 19, 2015. Retrieved 2015-01-17.
- ^ "Horizons Batch for 2060-Oct-22 Earth approach". JPL Horizons. Archived from the original on 2022-06-16. Retrieved 2022-06-16.
- ^ Comet Close Approaches to the Earth
- ^ "Electronic Telegram No. 5046 : ARID METEORS 2021". Central Bureau for Astronomical Telegrams. Retrieved 2021-10-01.
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- Elements and Ephemeris for 15P/Finlay – Minor Planet Center
- 15P at Kronk's Cometography
- 15P at Kazuo Kinoshita's Comets
- 15P at Seiichi Yoshida's Comet Catalog
- 15P at CometBase database
- 2014 June 22 recovery at apmag 20 (comets-ml)
- 15P/Finlay on 18 Dec 2014 (200mm lens F5.6 / Rob Kaufman of Australia)
- Animation of 15P/Finlay by FRAM (0.3-m f/10 reflector + CCD, MPC I47), 17th and 18th Dec 2014 (Martin Masek)