128 Nemesis (Asteroid)
From South El Monte , 128 Nemesis is visible in the evening sky, becoming accessible around 20:24 (PDT), 26° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 21:02, 27° above your southern horizon. It will continue to be observable until around 22:52, when it sinks below 21° above your south-western horizon.
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Name
128 Nemesis
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Object type
Asteroid
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Current position
| Computed for: | 28 August 2026 |
| Right ascension: | 18h39m [1] |
| Declination: | −28°42' [1] |
| Constellation: | Sagittarius |
| Magnitude: | 12.22 (V) [1] |
| Distance: | 1.96 AU 16.29 lightmin [1] |
Orbital elements [1]
| Semi-major axis: | 2.75 AU |
| Eccentricity: | 0.126871 |
| Inclination: | 6.25° |
| Longitude ascending node: | 76.16° |
| Argument of perihelion: | 302.77° |
| Epoch of elements: | 9 Jun 2026 |
| Mean Anomaly at epoch: | 275.15° |
| Absolute mag (H): | 7.69 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.40 AU |
| Aphelion: | 3.10 AU |
| Orbital period: | 4.56 years |
Source