 Hubble Space Telescope image of Cyllarus taken in 2010 | |
| Discovery | |
|---|---|
| Discovered by | N. Danzl |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 12 October 1998 |
| Designations | |
| MPC designation | (52975) Cyllarus |
| Pronunciation | /ˈsɪlərəs/ |
| Named after | Cyllarus (Greek mythology) |
| Alternative designations | 1998 TF35 |
| Minor planet category | centaur · distant |
| Symbol | .svg){kind=small} (astrological) |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 9.95 yr (3,636 days) |
| Aphelion | 35.971 AU |
| Perihelion | 16.254 AU |
| Semi-major axis | 26.113 AU |
| Eccentricity | 0.3775 |
| Orbital period (sidereal) | 133.44 yr (48,739 days) |
| Mean anomaly | 75.673° |
| Mean motion | 0° 0 26.64 / day |
| Inclination | 12.651° |
| Longitude of ascending node | 52.073° |
| Argument of perihelion | 300.77° |
| TJupiter | 4.2470 |
| Physical characteristics | |
| Dimensions | 62 km |
| Geometric albedo | 0.115 |
| Spectral type | RR B–V = 1.096±0.095 V–R = 0.680±0.085 |
| Apparent magnitude | 23.93 |
| Absolute magnitude (H) | 9.4 |
52975 Cyllarus /ˈsɪlərəs/ (provisional designation 1998 TF35) is a very red centaur, approximately 62 kilometers (39 miles) in diameter, orbiting the Sun in the outer Solar System. It was discovered on 12 October 1998, by American astronomer Nichole Danzl at the Kitt Peak National Observatory near Sells, Arizona, in the United States. It was later named after the mythological centaur Cyllarus.
Orbit and classification
Cyllarus orbits the Sun in the outer main-belt at a distance of 16.3–36.0 AU once every 133 years and 5 months (48,739 days). Its orbit has an eccentricity of 0.38 and an inclination of 13° with respect to the ecliptic. Cyllarus came to perihelion in September 1989. The body's observation arc begins with its official discovery observation at Kitt Peak, as no precoveries were taken, and no prior identifications were made.
Naming
This minor planet was named for the Cyllarus, a centaur of Greek mythology. The official naming citation was published by the Minor Planet Center on 14 June 2003 (M.P.C. 49102).
A symbol derived from that for 2060 Chiron, 
, was devised in the late 1990s by German astrologer Robert von Heeren. It replaces Chiron's K with a CY for Cyllarus.
Physical characteristics
As of 2017, no rotational lightcurve has been obtained from photometric observations. The body's rotation period and shape, as well as its spectral type remains unknown. Cyllarus measures approximately 62 kilometers (39 miles) in diameter, for an albedo of 0.115. It is a red centaur with (RR), and has an absolute magnitude of 9.4.
See also
References
- ^ "JPL Small-Body Database Browser: 52975 Cyllarus (1998 TF35)" (2008-09-25 last obs.). Jet Propulsion Laboratory. Retrieved 28 June 2017.
- Noah Webster (1884) A Practical Dictionary of the English Language
- ^ Schmadel, Lutz D. (2006). "(52975) Cyllarus [26.3, 0.38, 12.6]". Dictionary of Minor Planet Names – Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 217. doi:10.1007/978-3-540-34361-5_2577. ISBN 978-3-540-34361-5.
- Marc W. Buie. "Orbit Fit and Astrometric record for 52975" (2008-09-25 using 29 observations). SwRI (Space Science Department). Retrieved 22 November 2009.
- ^ "52975 Cyllarus (1998 TF35)". Minor Planet Center. Retrieved 25 April 2017.
- ^ Johnston, Wm. Robert (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 12 August 2021.
- ^ Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited". Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. S2CID 54776793. Retrieved 26 September 2019.
- "AstDys (52975) Cyllarus Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 25 April 2017.
- "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 April 2017.
- Miller, Kirk; Stein, Zane (26 August 2021). "Comment on U+26B7 CHIRON" (PDF). L2/21-225.
External links
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (50001)-(55000) – Minor Planet Center
- 52975 Cyllarus at the JPL Small-Body Database
| Minor planets navigator | |
|---|---|
| Small Solar System bodies | |||||||
|---|---|---|---|---|---|---|---|
| Minor planets |
| ||||||
| Comets | |||||||
| Other | |||||||