 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 13 October 1879 |
| Designations | |
| (205) Martha | |
| Pronunciation | /ˈmɑːrθə/[1] |
Named after | Martha of Bethany |
| A879 TB | |
| Main belt | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.51 yr (49860 d) |
| Aphelion | 2.8758 AU (430.21 Gm) |
| Perihelion | 2.6783 AU (400.67 Gm) |
| 2.7771 AU (415.45 Gm) | |
| Eccentricity | 0.035571 |
| 4.63yr (1690.3d) | |
Averageorbital speed | 17.87 km/s |
| 198.37° | |
| 0° 12m 46.692s / day | |
| Inclination | 10.696° |
| 211.792° | |
| 177.281° | |
| Physical characteristics | |
| Dimensions | 80.58±1.4 km |
| 14.911 h (0.6213 d) | |
| 0.0553±0.002 | |
| C | |
| 9.23 | |
205 Martha is a largemain beltasteroid. It is a dark, primitivecarbonaceousC-type asteroid. This object was discovered byJohann Palisa on 13 October 1879, inPola and was named afterMartha, a woman in theNew Testament.
Efforts to determine the rotation period for this asteroid have produced wildly different results, in large part because the actual period is close to half of an Earth day. A study performed during 2013 showed that thelight curve changed significantly during the observation period, adding to the difficulty. This study gave a synodicrotation period of 14.905 ± 0.001 h.[3]
_mathilde.jpg) | This article about a C-type asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
