3553 Mera, provisional designation 1985 JA, is an Amor asteroid discovered on May 14, 1985, by C. Shoemaker at Palomar. It was named for Maera, a daughter of Praetus.[3]
| Discovery[1] | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar |
| Discovery date | 14 May 1985 |
| Designations | |
MPC designation | (1985) JA |
| Pronunciation | /ˈmɪərə/ |
Alternative designations | MPO 270210 |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 30.37 yr (11,094 d) |
| Aphelion | 2.171 AU (324.8 Gm) |
| Perihelion | 1.118 AU (167.3 Gm) |
Semi-major axis | 1.645 AU (246.1 Gm) |
| Eccentricity | 0.320 |
Orbital period (sidereal) | 2.11 yr (770.34 d) |
Mean anomaly | 182.3° |
Mean motion | 0° 28m 1.2s / day |
| Inclination | 36.77° |
Longitude of ascending node | 232.5° |
Argument of perihelion | 288.9° |
| Earth MOID | 0.29 AU (43 Gm) |
| Physical characteristics | |
Synodic rotation period | 3.1944 h (0.13310 d) |
Absolute magnitude (H) | 16.4 |
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