102005 1999 RS81 (Asteroid)
From South El Monte , 102005 1999 RS81 is visible in the evening sky, becoming accessible around 19:37 (PDT), 32° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 20:04, 33° above your southern horizon. It will continue to be observable until around 22:41, when it sinks below 21° above your south-western horizon.
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Name
102005 1999 RS81
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Object type
Asteroid
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Current position
| Computed for: | 29 September 2025 |
| Right ascension: | 19h48m [1] |
| Declination: | −22°49' [1] |
| Constellation: | Sagittarius |
| Magnitude: | 19.36 (V) [1] |
| Distance: | 1.21 AU 10.04 lightmin [1] |
| Angular motion (speed): | 33.69 arcmin/day[1] |
| Angular motion (pos ang): | 252.3° |
Orbital elements [1]
| Semi-major axis: | 2.21 AU |
| Eccentricity: | 0.183540 |
| Inclination: | 7.03° |
| Longitude ascending node: | 335.89° |
| Argument of perihelion: | 350.33° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 285.83° |
| Absolute mag (H): | 16.32 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 1.80 AU |
| Aphelion: | 2.61 AU |
| Orbital period: | 3.28 years |