2991 Bilbo
asteroid
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Summary
2991 Bilbo is an asteroid[1]. It ranks in the top 2% of asteroid entities by monthly Wikipedia readership (6 views/month).[2]
Key Facts
- Discoverer or inventor: Martin Watt[3]
- Site of astronomical discovery: Anderson Mesa Station[4]
- Named after: Bilbo Baggins[5]
- Follows: 2990 Trimberger[6]
- Followed by: 2992 Vondel[7]
- Minor planet group: asteroid belt[8]
- Commons category: 2991 Bilbo[9]
- Parent astronomical body: Sun[10]
- Provisional designation: 1975 JC[11], 1979 SY3[12], 1982 HV[13], 1982 KB2[14]
- Time of discovery or invention: April 21, 1982[15]
- Significant event: naming[16]
- Orbital eccentricity: 0.22[17], 0.2207027[18], 0.2215254551510841[19]
- Absolute magnitude: 13.6[20], 13.74[21]
- Orbital inclination: 5.15183 degree[22], 5.152792148370315 degree[23]
- Orbital period: 3.57 years[24], 1304.99728405368 day[25]
- Rotation period: 4.0637 hour[26]
- Longitude of ascending node: 96.60931 degree[27], 96.55705614572412 degree[28]
- Semi-major axis of an orbit: 2.3375678 astronomical unit[29], 2.337082915413239 astronomical unit[30]
- Apoapsis: 2.853 astronomical unit[31], 2.854806271975979 astronomical unit[32]
- Periapsis: 1.8216603 astronomical unit[33], 1.819359558850499 astronomical unit[34]
- Argument of periapsis: 198.04638 degree[35], 197.9533451800289 degree[36]
- Mean anomaly: 70.81423 degree[37], 12.899230584525 degree[38]
- Diameter: 7.818 km[39]
- Albedo: 0.115[40]
- Epoch: November 21, 2025[41]
Why It Matters
2991 Bilbo has Wikipedia articles in 16 language editions, a strong signal of global cultural recognition.[42] It is known by 14 alternative names across languages and contexts.[43]