এরিস

উইকিপিডিয়া, মুক্ত বিশ্বকোষ থেকে
২০০৩ ইউবি৩১৩
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
Epoch March 6, 2006 (JD 2453800.5)
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