75490 1999 XQ178 (Asteroid)
From South El Monte , 75490 1999 XQ178 is visible in the dawn sky, rising at 02:57 (PDT) – 3 hours and 58 minutes before the Sun – and reaching an altitude of 35° above the eastern horizon before fading from view as dawn breaks at around 05:56.
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Name
75490 1999 XQ178
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Object type
Asteroid
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Current position
| Computed for: | 16 October 2025 |
| Right ascension: | 10h42m [1] |
| Declination: | +18°21' [1] |
| Constellation: | Leo |
| Magnitude: | 20.72 (V) [1] |
| Distance: | 3.54 AU 29.43 lightmin [1] |
| Angular motion (speed): | 8.27 arcmin/day[1] |
| Angular motion (pos ang): | 285.1° |
Orbital elements [1]
| Semi-major axis: | 2.62 AU |
| Eccentricity: | 0.210235 |
| Inclination: | 14.20° |
| Longitude ascending node: | 88.85° |
| Argument of perihelion: | 273.63° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 59.43° |
| Absolute mag (H): | 14.79 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 2.07 AU |
| Aphelion: | 3.17 AU |
| Orbital period: | 4.23 years |