2015 XF55 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.86 AU to 1.22 AU from the Sun; one orbit takes 387.1 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.207 AU
- True anomaly
- 199.17°
- Distance from Earth
- 1.786 AU
- As of
- 4 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
- 12h 21m 22s
- Declination
- +04° 47′ 05″
- Constellation
- Virgo
- Distance from Earth
- 1.79 AU
- Elongation from the Sun
- 39.94° — near the Sun — look low at dusk or dawn
Visible from both hemispheres.
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
- 1.04 AU
- Eccentricity
- 0.1743
- Inclination
- 9.94°
- Orbital period
- 387.1 days
- Perihelion
- 0.858 AU
- Aphelion
- 1.221 AU
- Longitude of ascending node
- 74.68°
- Argument of periapsis
- 237.2°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 27.2 LD
- 0.07 AU
- Tisserand (Jupiter)
- 5.872
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 23
- Data arc
- 13 days
- First observed
- 3 December 2015
- Last observed
- 16 December 2015
- Residual RMS
- 0.53 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 25
Discovery & classification
Close approaches 28 on record
Top-down view of the ecliptic, Earth at the centre, for the 2030-04-18 07:32 UTC close approach of 2015 XF55. Catalogue miss distance 166.5 LD · 6.4 × 10⁷ km. The curve is the geocentric path from 2030-04-15 to 2030-04-21, 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 |
|---|---|---|---|---|
| 2027-04-11 05:03:00 | Venus | 0.1487 AU | 57.9 LD | 2.9 km/s |
| 2030-04-18 07:32:00 | Earth | 0.4277 AU | 166.5 LD | 18.6 km/s |
| 2031-05-12 02:30:00 | Earth | 0.0925 AU | 36.0 LD | 8.7 km/s |
| 2032-12-21 11:26:00 | Earth | 0.2151 AU | 83.7 LD | 6.6 km/s |
| 2033-11-13 15:54:00 | Earth | 0.1264 AU | 49.2 LD | 9.5 km/s |
| 2034-11-23 22:04:00 | Earth | 0.4692 AU | 182.6 LD | 20 km/s |
| 2048-04-22 22:22:00 | Earth | 0.3357 AU | 130.7 LD | 15.9 km/s |
| 2051-11-15 15:59:00 | Earth | 0.2134 AU | 83.1 LD | 12.3 km/s |
| 2066-04-29 18:33:00 | Earth | 0.2306 AU | 89.8 LD | 12.8 km/s |
| 2069-11-18 06:40:00 | Earth | 0.3203 AU | 124.7 LD | 15.5 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