1221 Amor
1221 Amor /ˈæmɔːr/ is an asteroid and near-Earth object on an eccentric orbit, approximately 1 kilometer (0.6 miles) in diameter. It is the namesake of the Amor asteroids, the second-largest subgroup of near-Earth objects. It was discovered by Eugène Delporte at the Uccle Observatory in 1932, the first time that an asteroid was seen to approach Earth so closely. The assumed S-type asteroid is one of few low-numbered asteroids for which no rotation period has been determined. It was assigned the provisional designation 1932 EA1 and named for Cupid, also known as "Amor" in Latin, the Roman equivalent of the Greek god Eros.
Orbital diagram of Amor (cyan) with Earth, Mars and Jupiter (outermost) on 12 March 1932 | |
| Discovery | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 12 March 1932 |
| Designations | |
MPC designation | (1221) Amor |
| Pronunciation | /ˈæmɔːr/ |
Named after | Cupid, Roman analogue of Eros (Classical mythology) |
Alternative designations | 1932 EA1 |
Minor planet category | |
| Adjectives | Amorian /əˈmɔːriən/ |
| Symbol | (astrological) |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.50 yr (31,595 d) |
| Aphelion | 2.7550 AU |
| Perihelion | 1.0832 AU |
Semi-major axis | 1.9191 AU |
| Eccentricity | 0.4355 |
Orbital period (sidereal) | 2.66 yr (971 d) |
Mean anomaly | 102.03° |
Mean motion | 0° 22m 14.52s / day |
| Inclination | 11.879° |
Longitude of ascending node | 171.34° |
| 26.656° | |
| Earth MOID | 0.1069 AU (41.6 LD) |
| Physical characteristics | |
Mean diameter |
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| S (assumed) | |
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