2021 GN1 is an asteroid in the Aten orbit class. Its orbit takes it from 0.81 AU to 1.19 AU from the Sun; one orbit takes 364.6 days. Orbit from the JPL solution of 4 April 2022.
Where is it now
- Distance from Sun
- 0.922 AU
- True anomaly
- 283.44°
- Distance from Earth
- 0.571 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 18m 20s
- Declination
- -28° 03′ 22″
- Constellation
- Sagittarius
- Distance from Earth
- 0.57 AU
- Elongation from the Sun
- 66.1° — 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
- 0.999 AU
- Eccentricity
- 0.1893
- Inclination
- 26.9°
- Orbital period
- 364.6 days
- Perihelion
- 0.81 AU
- Aphelion
- 1.188 AU
- Longitude of ascending node
- 14.12°
- Argument of periapsis
- 68.64°
- Epoch · J2000
- 2459308.5
- Orbit class · ATE
- Aten
- Earth MOID · 12.4 LD
- 0.0318 AU
- Tisserand (Jupiter)
- 5.977
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 8).
- Observations used
- 31
- Data arc
- 3 days
- First observed
- 3 April 2021
- Last observed
- 6 April 2021
- Residual RMS
- 0.59 ″
- Solution · Otto Matic
- 4 April 2022
Visual & observation
- Absolute magnitude (H)
- 26.42
Discovery & classification
Close approaches 35 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-04-02 02:25 UTC close approach of 2021 GN1. Catalogue miss distance 44.5 LD · 1.71 × 10⁷ km. The curve is the geocentric path from 2027-03-30 to 2027-04-05, 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 |
|---|---|---|---|---|
| 2027-04-02 02:25:00 | Earth | 0.1143 AU | 44.5 LD | 13.7 km/s |
| 2028-04-01 07:22:00 | Earth | 0.1368 AU | 53.2 LD | 13.6 km/s |
| 2029-04-01 14:27:00 | Earth | 0.1604 AU | 62.4 LD | 13.6 km/s |
| 2030-04-02 00:50:00 | Earth | 0.185 AU | 72.0 LD | 13.6 km/s |
| 2031-04-02 12:14:00 | Earth | 0.2102 AU | 81.8 LD | 13.6 km/s |
| 2032-04-02 04:01:00 | Earth | 0.2356 AU | 91.7 LD | 13.6 km/s |
| 2033-04-02 23:18:00 | Earth | 0.2611 AU | 101.6 LD | 13.7 km/s |
| 2034-04-03 20:54:00 | Earth | 0.2869 AU | 111.6 LD | 13.8 km/s |
| 2035-04-05 01:21:00 | Earth | 0.3124 AU | 121.6 LD | 14 km/s |
| 2036-04-05 06:44:00 | Earth | 0.3375 AU | 131.3 LD | 14.1 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