504800
Add to an observing list or journal →504800 (2010 CO1)
504800 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.79 AU to 1.23 AU from the Sun; one orbit takes 372.3 days; it is about 0.38 km across. Discovered 1 February 2010 by WISE. Orbit from the JPL solution of 1 March 2023.
Where is it now
- Distance from Sun
- 1.027 AU
- True anomaly
- 106.17°
- Distance from Earth
- 0.866 AU
- As of
- 3 November 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 19h 19m 59s
- Declination
- -22° 33′ 23″
- Constellation
- Sagittarius
- Distance from Earth
- 0.87 AU
- Elongation from the Sun
- 66.75° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
From your location
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 1.013 AU
- Eccentricity
- 0.2178
- Inclination
- 24.02°
- Orbital period
- 372.3 days
- Perihelion
- 0.792 AU
- Aphelion
- 1.233 AU
- Longitude of ascending node
- 351.55°
- Argument of periapsis
- 252.73°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 8.4 LD
- 0.0215 AU
- Tisserand (Jupiter)
- 5.925
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 158
- Data arc
- 9.83 years
- First observed
- 7 January 2010
- Last observed
- 8 November 2019
- Residual RMS
- 0.48 ″
- Solution · Otto Matic
- 1 March 2023
Physical properties
- Mean radius
- 0.19 km
Visual & observation
- Geometric albedo
- 0.032
- Absolute magnitude (H)
- 21.48
Discovery & classification
- Discovered by
- WISE
- Discovery date
- 1 February 2010
- Discovery site
- WISE
Also known as 2010 CO1
Close approaches 108 on record
Top-down view of the ecliptic, Earth at the centre, for the 2061-02-07 19:25 UTC close approach of 504800. Catalogue miss distance 193.7 LD · 7.45 × 10⁷ km. The curve is the geocentric path from 2061-02-04 to 2061-02-10, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2061-02-07 19:25:00 | Earth | 0.4977 AU | 193.7 LD | 25.4 km/s |
| 2062-02-14 00:02:00 | Earth | 0.3852 AU | 149.9 LD | 22.4 km/s |
| 2063-02-20 10:00:00 | Earth | 0.2725 AU | 106.1 LD | 19.6 km/s |
| 2064-02-27 05:29:00 | Earth | 0.1641 AU | 63.9 LD | 17 km/s |
| 2065-03-05 13:38:00 | Earth | 0.0831 AU | 32.4 LD | 15 km/s |
| 2066-03-13 20:51:00 | Earth | 0.1151 AU | 44.8 LD | 13.7 km/s |
| 2067-03-24 04:45:00 | Earth | 0.2128 AU | 82.8 LD | 13.2 km/s |
| 2068-04-06 18:41:00 | Earth | 0.3164 AU | 123.1 LD | 13.3 km/s |
| 2068-10-09 16:21:00 | Earth | 0.4697 AU | 182.8 LD | 11.9 km/s |
| 2069-05-03 12:40:00 | Earth | 0.4084 AU | 159.0 LD | 12.4 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB