2023 GU1 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.81 AU to 1.26 AU from the Sun; one orbit takes 383.6 days. Orbit from the JPL solution of 30 April 2023.
Where is it now
- Distance from Sun
- 1.228 AU
- True anomaly
- 203.87°
- Distance from Earth
- 1.644 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
- 18h 00m 22s
- Declination
- -23° 19′ 01″
- Constellation
- Sagittarius
- Distance from Earth
- 1.65 AU
- Elongation from the Sun
- 47.84° — 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.
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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
- 1.033 AU
- Eccentricity
- 0.2161
- Inclination
- 0.62°
- Orbital period
- 383.6 days
- Perihelion
- 0.81 AU
- Aphelion
- 1.257 AU
- Longitude of ascending node
- 142.25°
- Argument of periapsis
- 320.2°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 3.0 LD
- 0.0077 AU
- Tisserand (Jupiter)
- 5.906
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 34
- Data arc
- 16 days
- First observed
- 14 April 2023
- Last observed
- 30 April 2023
- Residual RMS
- 0.51 ″
- Solution · Otto Matic
- 30 April 2023
Visual & observation
- Absolute magnitude (H)
- 26.71
Discovery & classification
Close approaches 49 on record
Top-down view of the ecliptic, Earth at the centre, for the 2040-09-19 01:18 UTC close approach of 2023 GU1. Catalogue miss distance 99.5 LD · 3.82 × 10⁷ km. The curve is the geocentric path from 2040-09-16 to 2040-09-22, 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 |
|---|---|---|---|---|
| 2039-10-30 12:39:00 | Venus | 0.1078 AU | 42.0 LD | 2.1 km/s |
| 2040-09-19 01:18:00 | Earth | 0.2557 AU | 99.5 LD | 13.6 km/s |
| 2041-10-05 01:21:00 | Earth | 0.0587 AU | 22.8 LD | 4.2 km/s |
| 2042-07-22 12:52:00 | Earth | 0.2318 AU | 90.2 LD | 5.6 km/s |
| 2043-06-02 05:14:00 | Earth | 0.2118 AU | 82.4 LD | 5.2 km/s |
| 2044-04-07 07:48:00 | Earth | 0.0311 AU | 12.1 LD | 6.9 km/s |
| 2045-04-23 20:26:00 | Earth | 0.3687 AU | 143.5 LD | 17 km/s |
| 2047-03-30 22:46:00 | Venus | 0.1067 AU | 41.5 LD | 2.1 km/s |
| 2079-09-13 18:24:00 | Earth | 0.3989 AU | 155.2 LD | 17.8 km/s |
| 2080-09-28 13:41:00 | Earth | 0.0726 AU | 28.3 LD | 8.1 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