Sedna
dwarf planet in the outermost Solar system
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Summary
Sedna is a Sednoid[1]. Sedna draws 8,892 Wikipedia views per month (sednoid category, ranking #1 of 4).[2]
Key Facts
- Discoverer or inventor: Michael E. Brown[3], Chadwick Trujillo[4], David L. Rabinowitz[5]
- Instance of: dwarf planet[6], detached object[7]
- Site of astronomical discovery: Palomar Observatory[8]
- Named after: Sedna[9]
- Follows: 90376 Kossuth[10]
- Followed by: (90378) 2003 WL23[11]
- Minor planet group: trans-Neptunian object[12]
- Commons category: 90377 Sedna[13]
- Parent astronomical body: Sun[14]
- Unicode character: ⯲[15]
- Provisional designation: 2003 VB12[16]
- Time of discovery or invention: November 14, 2003[17]
- Significant event: naming[18]
- Topic's main category: Category:90377 Sedna[19]
- Commons gallery: 90377 Sedna[20]
- Orbital eccentricity: 0.8612973329749037[21]
- Apparent magnitude: 21.12[22]
- Absolute magnitude: 1.6[23], 1.49[24]
- Color index: 1.24[25], 0.78[26]
- Orbital inclination: 11.92864 degree[27], 11.92591698495942 degree[28]
- Temperature: 12 K[29]
- Orbital period: 4705404.650143452 day[30]
- Rotation period: 10.273 hour[31]
- Longitude of ascending node: 144.55 degree[32], 144.4786863232386 degree[33]
- Semi-major axis of an orbit: 484.5211488 astronomical unit[34], 549.5396510704963 astronomical unit[35]
Why It Matters
Sedna has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[36] Sedna is known by 45 alternative names across languages and contexts.[37]