887 Alinda
| Discovery | |
|---|---|
| Discovered by | M. Wolf |
| Discovery site | Heidelberg Obs. |
| Discovery date | 3 January 1918 |
| Designations | |
| MPC designation | 887 Alinda |
|
Named after
|
Alinda (city) or Aboriginal mythology |
| 1918 DB | |
| Amor, NEO | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 97.42 yr (35582 days) |
| Aphelion | 3.8846 AU (581.13 Gm) |
| Perihelion | 1.0731 AU (160.53 Gm) |
| 2.4788 AU (370.82 Gm) | |
| Eccentricity | 0.56711 |
| 3.90 yr (1425.5 d) | |
| 300.87° | |
| 0° 15m 9.144s / day | |
| Inclination | 9.3563° |
| 110.55° | |
| 350.34° | |
| Earth MOID | 0.0907705 AU (13.57907 Gm) |
| Jupiter MOID | 1.32066 AU (197.568 Gm) |
| Jupiter Tisserand parameter | 3.221 |
| Physical characteristics | |
|
Mean radius
|
2.1 km |
| 73.97 h (3.082 d) | |
| 0.31 | |
|
B–V = 0.832 U–B = 0.436 Tholen = S |
|
| 13.4 | |
887 Alinda (/əˈlɪndə/ ə-LIN-də) is a very eccentric, near-Earth asteroid with an Earth minimum orbit intersection distance (MOID) of 0.092 AU. It is the namesake for the Alinda family group of asteroids and measures about 4 kilometers in diameter. The stony S-type asteroid was discovered by German astronomer Max Wolf at Heidelberg Observatory on 3 January 1918.
Due to its high eccentricity and semi-major axis of 0.57 and 2.5 AU, respectively, it is a typical Amor III asteroid. It has both, a 1:3 orbital resonance with Jupiter and a close to 4:1 resonance with Earth. In addition, because its orbit also lies within the asteroid belt, it is often classified as a main-belt asteroid.
Alinda makes close approaches to Earth, including a pass in January 2025, where it comes within 0.0821 AU (12,280,000 km; 7,630,000 mi) of Earth.
The asteroid's name had been proposed by H. Kobol. It is uncertain whether it refers to the ancient city of Alinda in modern western Turkey, or to a mythological figure of the Australian aboriginals.
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