2009 SM104 is an asteroid in the Aten orbit class. Its orbit takes it from 0.62 AU to 1.34 AU from the Sun; one orbit takes 355.1 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.212 AU
- True anomaly
- 144.57°
- Distance from Earth
- 1.866 AU
- As of
- 2 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
- 16h 57m 04s
- Declination
- -28° 45′ 35″
- Constellation
- Ophiuchus
- Distance from Earth
- 1.87 AU
- Elongation from the Sun
- 35.84° — near the Sun — look low at dusk or dawn
Favours the southern hemisphere; low or below the horizon from far north.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.
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
- 0.981 AU
- Eccentricity
- 0.3674
- Inclination
- 9.67°
- Orbital period
- 355.1 days
- Perihelion
- 0.621 AU
- Aphelion
- 1.342 AU
- Longitude of ascending node
- 0.78°
- Argument of periapsis
- 139.01°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 26.1 LD
- 0.067 AU
- Tisserand (Jupiter)
- 6.098
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 46
- Data arc
- 15 days
- First observed
- 26 September 2009
- Last observed
- 11 October 2009
- Residual RMS
- 0.51 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 23.6
Discovery & classification
Close approaches 34 on record
Top-down view of the ecliptic, Earth at the centre, for the 2034-06-24 07:54 UTC close approach of 2009 SM104. Catalogue miss distance 185.0 LD · 7.11 × 10⁷ km. The curve is the geocentric path from 2034-06-21 to 2034-06-27, 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. At closest approach the object is south of the ecliptic. 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 |
|---|---|---|---|---|
| 2034-06-24 07:54:00 | Earth | 0.4754 AU | 185.0 LD | 24.3 km/s |
| 2035-06-16 13:16:00 | Earth | 0.3262 AU | 126.9 LD | 19.3 km/s |
| 2036-06-07 07:56:00 | Earth | 0.1991 AU | 77.5 LD | 14.4 km/s |
| 2044-10-15 07:23:00 | Earth | 0.082 AU | 31.9 LD | 10.2 km/s |
| 2045-10-13 05:40:00 | Earth | 0.1366 AU | 53.2 LD | 14.7 km/s |
| 2185-10-16 10:23:00 | Earth | 0.0888 AU | 34.6 LD | 12.9 km/s |
| 2186-10-11 08:57:00 | Earth | 0.2345 AU | 91.2 LD | 17.9 km/s |
| 2198-08-03 00:44:00 | Venus | 0.1128 AU | 43.9 LD | 10.3 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB