89558 2001 XR99 (Asteroid)
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From South El Monte , 89558 2001 XR99 is visible in the evening sky, becoming accessible around 17:57 (PST), 35° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 19:59, 43° above your southern horizon. It will continue to be observable until around 23:29, when it sinks below 21° above your south-western horizon.
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Name
89558 2001 XR99
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Object type
Asteroid
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Current position
| Computed for: | 03 November 2025 |
| Right ascension: | 23h02m [1] |
| Declination: | −12°11' [1] |
| Constellation: | Aquarius |
| Magnitude: | 19.74 (V) [1] |
| Distance: | 1.70 AU 14.11 lightmin [1] |
| Angular motion (speed): | 21.83 arcmin/day[1] |
| Angular motion (pos ang): | 248.4° |
Orbital elements [1]
| Semi-major axis: | 2.58 AU |
| Eccentricity: | 0.083439 |
| Inclination: | 4.08° |
| Longitude ascending node: | 80.31° |
| Argument of perihelion: | 291.80° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 285.14° |
| Absolute mag (H): | 15.69 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.36 AU |
| Aphelion: | 2.79 AU |
| Orbital period: | 4.14 years |
Visibility from South El Monte
All times shown in South El Monte local time.