2017 YQ5 is an asteroid in the Aten orbit class. Its orbit takes it from 0.83 AU to 1.17 AU from the Sun; one orbit takes 363.7 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.16 AU
- True anomaly
- 191.66°
- Distance from Earth
- 0.539 AU
- As of
- 2 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
- 08h 21m 54s
- Declination
- +03° 23′ 15″
- Constellation
- Hydra
- Distance from Earth
- 0.53 AU
- Elongation from the Sun
- 94.14° — well clear of the Sun
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
- 0.997 AU
- Eccentricity
- 0.1684
- Inclination
- 16.98°
- Orbital period
- 363.7 days
- Perihelion
- 0.829 AU
- Aphelion
- 1.165 AU
- Longitude of ascending node
- 91.84°
- Argument of periapsis
- 142.56°
- Epoch · J2000
- 2458113.5
- Orbit class · ATE
- Aten
- Earth MOID · 47.5 LD
- 0.122 AU
- Tisserand (Jupiter)
- 6.043
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 8).
- Observations used
- 17
- Data arc
- 2 days
- First observed
- 25 December 2017
- Last observed
- 27 December 2017
- Residual RMS
- 0.45 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 24.7
Discovery & classification
Close approaches 47 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-01-12 12:57 UTC close approach of 2017 YQ5. Catalogue miss distance 107.2 LD · 4.12 × 10⁷ km. The curve is the geocentric path from 2027-01-09 to 2027-01-15, 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 |
|---|---|---|---|---|
| 2027-01-12 12:57:00 | Earth | 0.2754 AU | 107.2 LD | 14.1 km/s |
| 2028-01-12 15:44:00 | Earth | 0.3085 AU | 120.0 LD | 15.1 km/s |
| 2029-01-11 15:13:00 | Earth | 0.3431 AU | 133.5 LD | 16.1 km/s |
| 2030-01-11 08:28:00 | Earth | 0.3793 AU | 147.6 LD | 17.1 km/s |
| 2031-01-10 21:41:00 | Earth | 0.4161 AU | 161.9 LD | 18.2 km/s |
| 2032-01-10 09:18:00 | Earth | 0.4535 AU | 176.5 LD | 19.4 km/s |
| 2033-01-08 15:15:00 | Earth | 0.4915 AU | 191.3 LD | 20.5 km/s |
| 2174-12-19 16:58:00 | Earth | 0.1806 AU | 70.3 LD | 9.3 km/s |
| 2175-12-22 12:55:00 | Earth | 0.168 AU | 65.4 LD | 9.3 km/s |
| 2176-12-24 08:24:00 | Earth | 0.156 AU | 60.7 LD | 9.4 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