666 Desdemona (Asteroid)
From South El Monte , 666 Desdemona is visible in the evening sky, becoming accessible around 19:13 (PDT), 44° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 20:52, 51° above your southern horizon. It will continue to be observable until around 00:51, when it sinks below 21° above your western horizon.
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Name
666 Desdemona
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Object type
Asteroid
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Current position
| Computed for: | 18 October 2025 |
| Right ascension: | 21h52m [1] |
| Declination: | −04°26' [1] |
| Constellation: | Aquarius |
| Magnitude: | 14.04 (V) [1] |
| Distance: | 1.34 AU 11.12 lightmin [1] |
| Angular motion (speed): | 29.01 arcmin/day[1] |
| Angular motion (pos ang): | 252.5° |
Orbital elements [1]
| Semi-major axis: | 2.59 AU |
| Eccentricity: | 0.236426 |
| Inclination: | 7.58° |
| Longitude ascending node: | 215.29° |
| Argument of perihelion: | 174.10° |
| Epoch of elements: | 25 January 2025 |
| Mean Anomaly at epoch: | 274.26° |
| Absolute mag (H): | 10.72 [1] |
| Slope parameter (G): | 0.15 [1] |
Derived quantities
| Perihelion: | 1.98 AU |
| Aphelion: | 3.21 AU |
| Orbital period: | 4.18 years |