2017 DR109 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.76 AU to 1.25 AU from the Sun; one orbit takes 369.5 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 0.987 AU
- True anomaly
- 260.84°
- Distance from Earth
- 1.345 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
- 17h 53m 22s
- Declination
- -24° 24′ 28″
- Constellation
- Sagittarius
- Distance from Earth
- 1.34 AU
- Elongation from the Sun
- 47.01° — 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.
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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
- 1.008 AU
- Eccentricity
- 0.2413
- Inclination
- 3.14°
- Orbital period
- 369.5 days
- Perihelion
- 0.765 AU
- Aphelion
- 1.251 AU
- Longitude of ascending node
- 340.91°
- Argument of periapsis
- 73.91°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 2.3 LD
- 0.0059 AU
- Tisserand (Jupiter)
- 6.017
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 29
- Data arc
- 5 days
- First observed
- 27 February 2017
- Last observed
- 4 March 2017
- Residual RMS
- 0.65 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 27.6
Discovery & classification
Close approaches 82 on record
Top-down view of the ecliptic, Earth at the centre, for the 2089-07-12 17:16 UTC close approach of 2017 DR109. Catalogue miss distance 185.0 LD · 7.11 × 10⁷ km. The curve is the geocentric path from 2089-07-09 to 2089-07-15, 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 |
|---|---|---|---|---|
| 2039-03-14 10:27:00 | Venus | 0.1405 AU | 54.7 LD | 8.8 km/s |
| 2070-07-02 14:52:00 | Venus | 0.1491 AU | 58.0 LD | 7.8 km/s |
| 2084-09-01 10:11:00 | Venus | 0.111 AU | 43.2 LD | 5.2 km/s |
| 2089-07-12 17:16:00 | Earth | 0.4754 AU | 185.0 LD | 21.1 km/s |
| 2090-07-15 21:13:00 | Earth | 0.4121 AU | 160.4 LD | 19.2 km/s |
| 2091-07-19 03:16:00 | Earth | 0.3488 AU | 135.7 LD | 17.3 km/s |
| 2092-07-21 05:59:00 | Earth | 0.2857 AU | 111.2 LD | 15.4 km/s |
| 2093-07-24 11:06:00 | Earth | 0.2228 AU | 86.7 LD | 13.5 km/s |
| 2094-07-27 12:18:00 | Earth | 0.1609 AU | 62.6 LD | 11.7 km/s |
| 2095-07-30 13:43:00 | Earth | 0.102 AU | 39.7 LD | 9.9 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