137390 1999 TS157 (Asteroid)
From South El Monte , 137390 1999 TS157 will become visible at around 21:14 (PDT), 29° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 00:17.
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Name
137390 1999 TS157
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Object type
Asteroid
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Current position
| Computed for: | 12 July 2025 |
| Right ascension: | 13h34m [1] |
| Declination: | −17°01' [1] |
| Constellation: | Virgo |
| Magnitude: | 21.37 (V) [1] |
| Distance: | 2.09 AU 17.42 lightmin [1] |
| Angular motion (speed): | 15.65 arcmin/day[1] |
| Angular motion (pos ang): | 297.8° |
Orbital elements [1]
| Semi-major axis: | 2.26 AU |
| Eccentricity: | 0.089100 |
| Inclination: | 6.42° |
| Longitude ascending node: | 350.63° |
| Argument of perihelion: | 61.33° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 131.82° |
| Absolute mag (H): | 16.68 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.05 AU |
| Aphelion: | 2.46 AU |
| Orbital period: | 3.39 years |