2017 SN16 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.87 AU to 1.16 AU from the Sun; one orbit takes 374.5 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.158 AU
- True anomaly
- 195°
- Distance from Earth
- 1.184 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
- 19h 08m 29s
- Declination
- -28° 36′ 20″
- Constellation
- Sagittarius
- Distance from Earth
- 1.19 AU
- Elongation from the Sun
- 63.53° — well clear of the Sun
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
- 1.017 AU
- Eccentricity
- 0.1457
- Inclination
- 13.38°
- Orbital period
- 374.5 days
- Perihelion
- 0.869 AU
- Aphelion
- 1.165 AU
- Longitude of ascending node
- 2.62°
- Argument of periapsis
- 136.89°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 35.9 LD
- 0.0922 AU
- Tisserand (Jupiter)
- 5.968
Orbit quality
Orbit very well determined (uncertainty code 1).
- Observations used
- 103
- Data arc
- 736 days
- First observed
- 24 September 2017
- Last observed
- 30 September 2019
- Residual RMS
- 0.43 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 23.34
Discovery & classification
Close approaches 87 on record
Top-down view of the ecliptic, Earth at the centre, for the 2055-10-14 03:06 UTC close approach of 2017 SN16. Catalogue miss distance 184.4 LD · 7.09 × 10⁷ km. The curve is the geocentric path from 2055-10-11 to 2055-10-17, 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. 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 |
|---|---|---|---|---|
| 2055-10-14 03:06:00 | Earth | 0.4739 AU | 184.4 LD | 18.3 km/s |
| 2056-10-17 00:40:00 | Earth | 0.3292 AU | 128.1 LD | 14 km/s |
| 2057-10-17 07:15:00 | Earth | 0.1953 AU | 76.0 LD | 10.3 km/s |
| 2058-10-10 13:49:00 | Earth | 0.1053 AU | 41.0 LD | 7.9 km/s |
| 2059-09-26 01:43:00 | Earth | 0.1283 AU | 49.9 LD | 7.3 km/s |
| 2060-02-18 08:20:00 | Earth | 0.1889 AU | 73.5 LD | 8 km/s |
| 2060-09-04 20:43:00 | Earth | 0.2009 AU | 78.2 LD | 7.2 km/s |
| 2061-03-19 20:52:00 | Earth | 0.1084 AU | 42.2 LD | 8.1 km/s |
| 2061-08-05 05:36:00 | Earth | 0.2612 AU | 101.7 LD | 6.3 km/s |
| 2062-04-12 13:11:00 | Earth | 0.1154 AU | 44.9 LD | 8.8 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