2018 PM28 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.95 AU to 1.1 AU from the Sun; one orbit takes 380.4 days. Orbit from the JPL solution of 11 October 2023.
Where is it now
- Distance from Sun
- 1.096 AU
- True anomaly
- 204.36°
- Distance from Earth
- 1.751 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 02m 57s
- Declination
- -23° 30′ 25″
- Constellation
- Ophiuchus
- Distance from Earth
- 1.75 AU
- Elongation from the Sun
- 34.88° — 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
- 1.028 AU
- Eccentricity
- 0.0748
- Inclination
- 2.28°
- Orbital period
- 380.4 days
- Perihelion
- 0.951 AU
- Aphelion
- 1.104 AU
- Longitude of ascending node
- 78.12°
- Argument of periapsis
- 5.02°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 12.7 LD
- 0.0327 AU
- Tisserand (Jupiter)
- 5.95
Orbit quality
Orbit reasonably well determined (uncertainty code 3).
- Observations used
- 51
- Data arc
- 274 days
- First observed
- 10 August 2018
- Last observed
- 11 May 2019
- Residual RMS
- 0.34 ″
- Solution · Otto Matic
- 11 October 2023
Visual & observation
- Absolute magnitude (H)
- 25.8
Discovery & classification
Close approaches 36 on record
Top-down view of the ecliptic, Earth at the centre, for the 2042-09-14 04:26 UTC close approach of 2018 PM28. Catalogue miss distance 104.3 LD · 4.01 × 10⁷ km. The curve is the geocentric path from 2042-09-11 to 2042-09-17, 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 |
|---|---|---|---|---|
| 2042-09-14 04:26:00 | Earth | 0.268 AU | 104.3 LD | 9.5 km/s |
| 2043-10-10 15:32:00 | Earth | 0.0371 AU | 14.5 LD | 2.1 km/s |
| 2044-05-25 22:10:00 | Earth | 0.0816 AU | 31.8 LD | 2.3 km/s |
| 2045-02-23 07:18:00 | Earth | 0.0868 AU | 33.8 LD | 4 km/s |
| 2046-03-10 03:16:00 | Earth | 0.3203 AU | 124.7 LD | 11.2 km/s |
| 2069-09-13 04:26:00 | Earth | 0.2787 AU | 108.5 LD | 9.8 km/s |
| 2070-10-01 17:57:00 | Earth | 0.0542 AU | 21.1 LD | 2.9 km/s |
| 2071-06-13 05:47:00 | Earth | 0.0814 AU | 31.7 LD | 2.2 km/s |
| 2072-02-20 18:30:00 | Earth | 0.0496 AU | 19.3 LD | 2.6 km/s |
| 2073-03-09 12:03:00 | Earth | 0.2762 AU | 107.5 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