| Minorplanet: | yes |
| Background: |
|
| 774 Armor | |
| Mpc Name: | (774) Armor |
| Alt Names: | 1913 TW |
| Discovered: | 19 December 1913 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Eccentricity: | 0.16914 |
| Semimajor: | 3.0472AU |
| Perihelion: | 2.5318AU |
| Aphelion: | 3.5625abbr=onNaNabbr=on |
| Period: | 5.32 yr (1942.9 d) |
| Inclination: | 5.5589° |
| Asc Node: | 250.253° |
| Arg Peri: | 28.478° |
| Mean Motion: | / day |
| Observation Arc: | 107.33 yr (39203 d) |
| Uncertainty: | 0 |
| Abs Magnitude: | 8.8 |
| Rotation: | 25.107abbr=onNaNabbr=on |
| Moid: | 1.51688AU |
| Jupiter Moid: | 1.56651AU |
| Tisserand: | 3.209 |
774 Armor is a minor planet (specifically an asteroid) orbiting in the main belt. It was discovered on 13 December 1913, in Paris by French astronomer Charles le Morvan and was named after the Celtic region of Armorica. The asteroid is orbiting at a distance of with a period of 1942.92NaN2 and an eccentricity of 0.169. The orbital plane is inclined by an angle of 5.56° to the plane of the ecliptic.
In the SMASS-I taxonomy, this is classified as an S-type asteroid. It spans a girth of approximately 50 km. 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 estimated rotation period of with a brightness variation of in magnitude. This is consistent with the results of an earlier study in 2006.