2018 DE1 is an asteroid in the Apollo orbit class. Its orbit takes it from 1 AU to 1.02 AU from the Sun; one orbit takes 371.7 days. Orbit from the JPL solution of 12 August 2022.
Where is it now
- Distance from Sun
- 1.003 AU
- True anomaly
- 12.59°
- Distance from Earth
- 0.773 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 21m 12s
- Declination
- -17° 13′ 43″
- Constellation
- Sagittarius
- Distance from Earth
- 0.77 AU
- Elongation from the Sun
- 67.93° — well clear of the Sun
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
- 1.012 AU
- Eccentricity
- 0.0092
- Inclination
- 12.38°
- Orbital period
- 371.7 days
- Perihelion
- 1.002 AU
- Aphelion
- 1.021 AU
- Longitude of ascending node
- 338.75°
- Argument of periapsis
- 4.88°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 2.8 LD
- 0.0073 AU
- Tisserand (Jupiter)
- 6.005
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 50
- Data arc
- 11 days
- First observed
- 18 February 2018
- Last observed
- 1 March 2018
- Residual RMS
- 0.65 ″
- Solution · Otto Matic
- 12 August 2022
Visual & observation
- Absolute magnitude (H)
- 25.5
Discovery & classification
Close approaches 51 on record
Top-down view of the ecliptic, Earth at the centre, for the 2073-03-13 14:39 UTC close approach of 2018 DE1. Catalogue miss distance 181.9 LD · 6.99 × 10⁷ km. The curve is the geocentric path from 2073-03-10 to 2073-03-16, 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 |
|---|---|---|---|---|
| 2073-03-13 14:39:00 | Earth | 0.4674 AU | 181.9 LD | 15.2 km/s |
| 2073-07-31 20:49:00 | Earth | 0.4735 AU | 184.3 LD | 14.9 km/s |
| 2074-03-11 03:41:00 | Earth | 0.3653 AU | 142.2 LD | 12.6 km/s |
| 2074-08-08 16:22:00 | Earth | 0.3702 AU | 144.1 LD | 12.3 km/s |
| 2075-03-08 18:19:00 | Earth | 0.2642 AU | 102.8 LD | 10.2 km/s |
| 2075-08-16 11:22:00 | Earth | 0.268 AU | 104.3 LD | 9.9 km/s |
| 2076-03-05 04:13:00 | Earth | 0.166 AU | 64.6 LD | 8.2 km/s |
| 2076-08-22 00:05:00 | Earth | 0.1691 AU | 65.8 LD | 7.9 km/s |
| 2077-03-02 06:55:00 | Earth | 0.0749 AU | 29.1 LD | 6.9 km/s |
| 2077-08-27 17:03:00 | Earth | 0.0783 AU | 30.5 LD | 6.7 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