757 Portlandia
Discovery | |
---|---|
Discovered by | Joel Hastings Metcalf |
Discovery site | Taunton, Massachusetts |
Discovery date | 30 September 1908 |
Designations | |
1908 EJ | |
Orbital characteristics[1] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 99.16 yr (36218 d) |
Aphelion | 2.6327 AU (393.85 Gm) |
Perihelion | 2.1142 AU (316.28 Gm) |
2.3734 AU (355.06 Gm) | |
Eccentricity | 0.10922 |
3.66 yr (1335.6 d) | |
133.453° | |
0° 16m 10.38s / day | |
Inclination | 8.1694° |
22.515° | |
44.204° | |
Earth MOID | 1.13364 AU (169.590 Gm) |
Jupiter MOID | 2.65433 AU (397.082 Gm) |
Jupiter Tisserand parameter | 3.521 |
Physical characteristics | |
Mean radius | ±0.7 16.045km |
6.5837 h (0.27432 d)[1] | |
±0.014 0.1427[1] | |
M | |
12.3 to 15.7 | |
10.20[1] | |
|
757 Portlandia is a main-belt asteroid 32 km in diameter.[1] In November 2015 amateur astronomers where photographing it in images of comet 67P/Churyumov–Gerasimenko.[2] Portlandia will come to opposition in March 2016 at apparent magnitude 13.2.
References
- 1 2 3 4 5 "JPL Small-Body Database Browser: 493 Griseldis (1902 JS)". Jet Propulsion Laboratory. Retrieved 5 May 2016.
- ↑ https://www.facebook.com/photo.php?fbid=10206800415562318
External links
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