Global Information276 Adelheid information
 Lightcurve-based 3D-model Adelheid | |
| Discovery [1] | |
|---|---|
| Discovered by | J. Palisa |
| Discovery site | Vienna Obs. |
| Discovery date | 17 April 1888 |
| Designations | |
MPC designation | (276) Adelheid |
| Pronunciation | German: [ˈaːdəlhaɪt][2] |
Named after | unknown (Adelheid)[3] |
Alternative designations | A888 HA |
Minor planet category | main-belt · (outer) [4] Alauda [5] |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 118.38 yr (43,239 days) |
| Aphelion | 3.3296 AU |
| Perihelion | 2.9065 AU |
Semi-major axis | 3.1181 AU |
| Eccentricity | 0.0678 |
Orbital period (sidereal) | 5.51 yr (2,011 days) |
Mean anomaly | 276.54° |
Mean motion | 0° 10m 44.4s / day |
| Inclination | 21.614° |
Longitude of ascending node | 211.16° |
Argument of perihelion | 265.21° |
| Physical characteristics | |
| Dimensions | 98.04±5.48 km[6] 102.674±0.731 km[7] 104±11 km[8] 114.723±3.276 km[9] 121.56 km (derived)[4] 121.60±7.7 km[10] 121.71±43.30 km[11] 125±15 km[12] 135.30±2.09 km[13] 156.53±47.83 km[14] |
Synodic rotation period | 6.29 h[15] 6.315±0.002 h[16] 6.315±0.005 h[17] 6.31920±0.00005 h[12] 6.31920 h[8] 6.319204±0.000001 h[18] 6.32 h[19] 6.328 h[20] 6.328 h[21] 12.48±0.05 h[22] |
Geometric albedo | 0.03±0.01[14] 0.036±0.001[13] 0.04±0.04[11] 0.0434 (derived)[4] 0.0450±0.006[10] 0.051±0.006[9] 0.0631±0.0107[7] 0.073±0.012[6] |
Spectral type | Tholen = X [1] · P [4][23] B–V = 0.708 [1] U–B = 0.271 [1] |
Absolute magnitude (H) | 8.50[6] · 8.56[7][10][13] · 8.60[1][4][14] · 8.61[11] |
Adelheid (minor planet designation: 276 Adelheid) is a dark Alauda asteroid from the outer region of the asteroid belt, approximately 121 kilometers in diameter. It was discovered by Austrian astronomer Johann Palisa at Vienna Observatory on 17 April 1888.[24] The meaning of the asteroids's name is unknown.[3]
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