21 Lutetia (Asteroid)
© ESA/Rosetta 2010
From South El Monte , 21 Lutetia is not observable – it will reach its highest point in the sky during daytime and is no higher than 21° above the horizon at dawn.
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Name
21 Lutetia
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Object type
Asteroid
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Current position
| Computed for: | 07 December 2025 |
| Right ascension: | 14h26m [1] |
| Declination: | −12°25' [1] |
| Constellation: | Libra |
| Magnitude: | 12.97 (V) [1] |
| Distance: | 3.34 AU 27.78 lightmin [1] |
| Angular motion (speed): | 10.47 arcmin/day[1] |
| Angular motion (pos ang): | 290.9° |
Orbital elements [1]
| Semi-major axis: | 2.43 AU |
| Eccentricity: | 0.164755 |
| Inclination: | 3.06° |
| Longitude ascending node: | 80.84° |
| Argument of perihelion: | 250.00° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 168.86° |
| Absolute mag (H): | 7.50 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.03 AU |
| Aphelion: | 2.83 AU |
| Orbital period: | 3.80 years |
Events
| 04 Jul 2030 | – Asteroid 21 Lutetia at opposition |
| 16 Aug 2034 | – Asteroid 21 Lutetia at opposition |
| 29 Sep 2038 | – Asteroid 21 Lutetia at opposition |
| 06 Jul 2049 | – Asteroid 21 Lutetia at opposition |
Printable finder charts
