2017 HF1 is an asteroid in the Aten orbit class. Its orbit takes it from 0.35 AU to 1.6 AU from the Sun; one orbit takes 352.9 days. Orbit from the JPL solution of 12 August 2022.
Where is it now
- Distance from Sun
- 1.501 AU
- True anomaly
- 195.91°
- Distance from Earth
- 2.421 AU
- As of
- 24 October 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
- 13h 01m 43s
- Declination
- -01° 33′ 45″
- Constellation
- Virgo
- Distance from Earth
- 2.42 AU
- Elongation from the Sun
- 17.5° — too close to the Sun to observe
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
- 0.977 AU
- Eccentricity
- 0.6407
- Inclination
- 13.22°
- Orbital period
- 352.9 days
- Perihelion
- 0.351 AU
- Aphelion
- 1.604 AU
- Longitude of ascending node
- 37.62°
- Argument of periapsis
- 309.24°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 3.9 LD
- 0.0099 AU
- Tisserand (Jupiter)
- 5.972
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 78
- Data arc
- 23 days
- First observed
- 6 April 2017
- Last observed
- 29 April 2017
- Residual RMS
- 0.47 ″
- Solution · Otto Matic
- 12 August 2022
Visual & observation
- Absolute magnitude (H)
- 22.69
Discovery & classification
Close approaches 107 on record
Top-down view of the ecliptic, Earth at the centre, for the 2033-01-25 22:10 UTC close approach of 2017 HF1. Catalogue miss distance 134.0 LD · 5.15 × 10⁷ km. The curve is the geocentric path from 2033-01-22 to 2033-01-28, 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 north 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 |
|---|---|---|---|---|
| 2028-12-30 15:24:00 | Venus | 0.1222 AU | 47.6 LD | 29.6 km/s |
| 2033-01-25 22:10:00 | Earth | 0.3444 AU | 134.0 LD | 29.3 km/s |
| 2034-01-17 06:48:00 | Earth | 0.2288 AU | 89.1 LD | 22.9 km/s |
| 2035-01-09 23:52:00 | Earth | 0.2605 AU | 101.4 LD | 16.7 km/s |
| 2036-01-17 14:11:00 | Earth | 0.4023 AU | 156.6 LD | 13.2 km/s |
| 2044-04-19 02:17:00 | Earth | 0.3889 AU | 151.3 LD | 14.5 km/s |
| 2045-04-28 13:44:00 | Earth | 0.2207 AU | 85.9 LD | 15.8 km/s |
| 2046-04-26 17:52:00 | Earth | 0.0284 AU | 11.0 LD | 20.6 km/s |
| 2047-04-20 05:59:00 | Earth | 0.1664 AU | 64.8 LD | 26.3 km/s |
| 2048-04-11 11:03:00 | Earth | 0.3561 AU | 138.6 LD | 32.4 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