২০০৩ ইউবি৩১৩
উইকিপিডিয়া, মুক্ত বিশ্বকোষ থেকে
2003 UB313 (center) and moon (right of center). Keck Observatory. |
|
Discovery A | |
---|---|
Discoverer | M. E. Brown, C. A. Trujillo, D. L. Rabinowitz |
Discovery date | October 21, 2003 |
Alternate designations B |
officially none; informally Xena |
Category | Trans-Neptunian object (Scattered disc object) |
Orbital elements C | |
|
|
Eccentricity (e) | 0.44177 |
Semi-major axis (a) | 67.6681 AU (10.12 Tm) |
Perihelion (q) | 37.77 AU (5.65 Tm) |
Aphelion (Q) | 97.56 AU (14.60 Tm) |
Orbital period (P) | 203,500 d (557 a) |
Mean orbital speed | 3.436 km/s |
Inclination (i) | 44.187° |
Longitude of the ascending node (Ω) |
35.8696° |
Argument of perihelion (ω) |
151.4305° |
Mean anomaly (M) | 197.63427° |
Physical characteristics D | |
Dimensions | 2400 km ± 100 km |
Mass | ?×10? kg |
Density | ? g/cm³ |
Surface gravity | ? m/s² |
Escape velocity | ? km/s |
Rotation period | > 8 h? |
Spectral class | ? |
Absolute magnitude | −1.12 ± 0.01 |
Albedo (geometric) | 0.86 ± 0.07 |
Mean surface temperature |
~30 K |
২০০৩ ইউবি৩১৩ একটি বামন গ্রহ