585428 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.79 AU to 1.26 AU from the Sun; one orbit takes 377.8 days. Discovered 9 July 2018 by Pan-STARRS 1. Orbit from the JPL solution of 7 October 2021.
Where is it now
- Distance from Sun
- 1.247 AU
- True anomaly
- 194.48°
- Distance from Earth
- 1.694 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 11s
- Declination
- -27° 03′ 06″
- Constellation
- Sagittarius
- Distance from Earth
- 1.7 AU
- Elongation from the Sun
- 46.68° — 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
- 1.023 AU
- Eccentricity
- 0.2309
- Inclination
- 27.66°
- Orbital period
- 377.8 days
- Perihelion
- 0.787 AU
- Aphelion
- 1.259 AU
- Longitude of ascending node
- 114.45°
- Argument of periapsis
- 355.83°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 76.6 LD
- 0.1968 AU
- Tisserand (Jupiter)
- 5.852
Orbit quality
Orbit very well determined (uncertainty code 1).
- Observations used
- 74
- Data arc
- 4.04 years
- First observed
- 10 June 2017
- Last observed
- 26 June 2021
- Residual RMS
- 0.51 ″
- Solution · Otto Matic
- 7 October 2021
Visual & observation
- Absolute magnitude (H)
- 20.97
Discovery & classification
- Discovered by
- Pan-STARRS 1
- Discovery date
- 9 July 2018
- Discovery site
- Haleakala
Also known as 2018 NP1
Close approaches 138 on record
Top-down view of the ecliptic, Earth at the centre, for the 2046-08-13 08:34 UTC close approach of 585428. Catalogue miss distance 166.8 LD · 6.41 × 10⁷ km. The curve is the geocentric path from 2046-08-10 to 2046-08-16, 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 |
|---|---|---|---|---|
| 2035-07-29 22:32:00 | Venus | 0.0771 AU | 30.0 LD | 16 km/s |
| 2046-08-13 08:34:00 | Earth | 0.4287 AU | 166.8 LD | 16.2 km/s |
| 2046-11-12 20:27:00 | Earth | 0.485 AU | 188.7 LD | 18.2 km/s |
| 2047-08-05 00:08:00 | Earth | 0.3272 AU | 127.3 LD | 14.7 km/s |
| 2047-12-10 20:40:00 | Earth | 0.3469 AU | 135.0 LD | 18.2 km/s |
| 2048-07-26 02:07:00 | Earth | 0.2601 AU | 101.2 LD | 14 km/s |
| 2049-01-01 00:17:00 | Earth | 0.2296 AU | 89.3 LD | 17.6 km/s |
| 2049-07-17 02:05:00 | Earth | 0.2421 AU | 94.2 LD | 13.9 km/s |
| 2050-01-21 20:10:00 | Earth | 0.2038 AU | 79.3 LD | 17.6 km/s |
| 2050-07-07 20:58:00 | Earth | 0.2772 AU | 107.9 LD | 14 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