2017 UF1 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.65 AU to 1.39 AU from the Sun; one orbit takes 378.7 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 0.739 AU
- True anomaly
- 304.57°
- Distance from Earth
- 1.727 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
- 14h 25m 37s
- Declination
- -15° 18′ 56″
- Constellation
- Libra
- Distance from Earth
- 1.72 AU
- Elongation from the Sun
- 3° — too close to the Sun to observe
Favours the southern hemisphere; low or below the horizon from far north.
From your location
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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
- 1.024 AU
- Eccentricity
- 0.3617
- Inclination
- 11.23°
- Orbital period
- 378.7 days
- Perihelion
- 0.654 AU
- Aphelion
- 1.395 AU
- Longitude of ascending node
- 25.21°
- Argument of periapsis
- 244.53°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 9.5 LD
- 0.0244 AU
- Tisserand (Jupiter)
- 5.891
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 22
- Data arc
- 6 days
- First observed
- 16 October 2017
- Last observed
- 22 October 2017
- Residual RMS
- 0.59 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 26.6
Discovery & classification
Close approaches 39 on record
Top-down view of the ecliptic, Earth at the centre, for the 2066-02-22 21:22 UTC close approach of 2017 UF1. Catalogue miss distance 133.1 LD · 5.11 × 10⁷ km. The curve is the geocentric path from 2066-02-19 to 2066-02-25, 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 |
|---|---|---|---|---|
| 2058-02-06 00:17:00 | Venus | 0.1318 AU | 51.3 LD | 16.1 km/s |
| 2066-02-22 21:22:00 | Earth | 0.3419 AU | 133.1 LD | 22 km/s |
| 2067-03-06 13:44:00 | Earth | 0.1528 AU | 59.5 LD | 15.4 km/s |
| 2068-03-24 00:38:00 | Earth | 0.1696 AU | 66.0 LD | 10 km/s |
| 2070-01-10 11:37:00 | Earth | 0.4453 AU | 173.3 LD | 9.7 km/s |
| 2070-12-21 01:26:00 | Earth | 0.4604 AU | 179.2 LD | 10.3 km/s |
| 2071-05-29 10:06:00 | Venus | 0.0681 AU | 26.5 LD | 13.5 km/s |
| 2074-10-13 22:29:00 | Earth | 0.0488 AU | 19.0 LD | 13.9 km/s |
| 2075-10-22 10:50:00 | Earth | 0.2665 AU | 103.7 LD | 20.4 km/s |
| 2076-10-30 19:58:00 | Earth | 0.4839 AU | 188.3 LD | 27 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