| Discovery | |
|---|---|
| Discovered by | C. le Morvan |
| Discovery site | Paris |
| Discovery date | 19 December 1913 |
| Designations | |
| (774) Armor | |
| 1913 TW | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 107.33 yr (39203 d) |
| Aphelion | 3.5625 AU (532.94 Gm) |
| Perihelion | 2.5318 AU (378.75 Gm) |
| 3.0472 AU (455.85 Gm) | |
| Eccentricity | 0.16914 |
| 5.32yr (1942.9d) | |
| 240.634° | |
| 0° 11m 7.044s / day | |
| Inclination | 5.5589° |
| 250.253° | |
| 28.478° | |
| Earth MOID | 1.51688 AU (226.922 Gm) |
| Jupiter MOID | 1.56651 AU (234.347 Gm) |
| TJupiter | 3.209 |
| Physical characteristics | |
| 25.185±0.95km | |
| 25.107 h (1.0461 d) | |
| 0.2529±0.020 | |
| 8.8 | |
774 Armor is aminor planet (specifically anasteroid) orbiting in themain belt. It was discovered on 13 December 1913, in Paris by French astronomerCharles le Morvan and was named after the Celtic region ofArmorica.[2] The asteroid is orbiting at a distance of3.05 AU with aperiod of 5.32 yr and aneccentricity of 0.169. Theorbital plane is inclined by an angle of 5.56° to theplane of the ecliptic.[1]
In theSMASS-I taxonomy, this is classified as anS-type asteroid.[3] It spans a girth of approximately 50 km.[1] The rotation of this asteroid is commensurate with the length of an Earth day, requiring measurements from more than one latitude for full coverage.Photometric observations from the US and Australia in 2012 provided an estimatedrotation period of25.107±0.005 h with a brightness variation of0.16±0.02 in magnitude. This is consistent with the results of an earlier study in 2006.[4]
_mathilde.jpg) | This article about an asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
