From Surf Wiki (app.surf) — the open knowledge base
258 Tyche
Main belt asteroid
Main belt asteroid
| Field | Value |
|---|---|
| minorplanet | yes |
| name | 258 Tyche |
| background | #D6D6D6 |
| image | 258Tyche (Lightcurve Inversion).png |
| caption | |
| discovery_ref | |
| discovered | 4 May 1886 |
| discoverer | R. Luther |
| discovery_site | Düsseldorf-Bilk Obs. |
| mpc_name | (258) Tyche |
| pronounced | |
| alt_names | A886 JA |
| named_after | Tyche |
| mp_category | Eunomiamain-belt |
| orbit_ref | |
| epoch | 31 July 2016 (JD 2457600.5) |
| uncertainty | 0 |
| observation_arc | 129.95 yr (47465 d) |
| aphelion | 3.1512 AU |
| perihelion | 2.0838 AU |
| semimajor | 2.6175 AU |
| eccentricity | 0.20390 |
| period | 4.23 yr (1546.8 d) |
| mean_anomaly | 157.95° |
| inclination | 14.305° |
| asc_node | 207.59° |
| arg_peri | 155.01° |
| moid | 1.09016 AU |
| avg_speed | 18.42 km/s |
| mass | ~ 4×1017 kg *(estimate)* |
| dimensions | |
| 65 km | |
| density | ~ 2.7 g/cm3 |
| rotation | 10.041 h |
| albedo | |
| 0.168 | |
| spectral_type | B–V = 0.876 |
| U–B = 0.459 | |
| S (Tholen), S (SMASS) | |
| abs_magnitude | 8.50 |
| single_temperature | ~ 169 K |
| *max:* 268 K | |
| mean_motion | / day |
| jupiter_moid | 2.34517 AU |
| tisserand | 3.334 |
the asteroid
65 km 0.168 U–B = 0.459 S (Tholen), S (SMASS) max: 268 K
258 Tyche is a relatively large main belt asteroid discovered by Robert Luther at Düsseldorf-Bilk Observatory on 4 May 1886. The stony S-type asteroid measures about 65 kilometers in diameter and has a perihelion of 2.1 AU.
Tyche orbits very close to the Eunomia family of asteroids, and could be a member based on composition. However, it is larger than all family members apart from 15 Eunomia while lying at the very edge of the family group. Hence, there is a good chance that it is an unrelated interloper.
There is some uncertainty regarding Tyche's rotation period. Various authors give values from 9.983 to 10.041 hours.
It was named after the Greek goddess of fortune, Tyche, which is also the name of one of the Oceanids. Tyche's Roman equivalent is Fortuna, after which the asteroid 19 Fortuna is named.
References
References
- Noah Webster (1884) ''A Practical Dictionary of the English Language''
- [http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab Supplemental IRAS Minor Planet Survey] {{webarchive. link. (June 23, 2006)
- [http://www.psi.edu/pds/archive/lc.html PDS lightcurve data] {{webarchive. link. (June 14, 2006)
- (2001). "Rotational periods of asteroids II". Planetary and Space Science.
- (2002). "Hidden Mass in the Asteroid Belt". Icarus.
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
Ask Mako anything about 258 Tyche — get instant answers, deeper analysis, and related topics.
Research with MakoFree with your Surf account
Create a free account to save articles, ask Mako questions, and organize your research.
Sign up freeThis content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.
Report