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Asteroid Near-Earth

2015 SA

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(2015 SA)

Where is it now

Distance from Sun
0.844 AU
True anomaly
254.6°
Distance from Earth
1.052 AU
As of
19 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.

Sun Earth — 0.996 AU from the Sun Earth 2015 SA — 0.844 AU from the Sun 2015 SA
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 SA is 1.052 AU from Earth today (8.7 light-minutes).

In the sky

Right ascension
10h 58m 57s
Declination
+17° 37′ 24″
Constellation
Leo
Distance from Earth
1.05 AU
Elongation from the Sun
48.47° — near the Sun — look low at dusk or dawn

Favours the northern hemisphere; low or below the horizon from far south.

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.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

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
0.841 AU
Eccentricity
0.2512
Inclination
13.2°
Orbital period
281.7 days
Perihelion
0.63 AU
Aphelion
1.052 AU
Longitude of ascending node
352.01°
Argument of periapsis
208.01°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.9 LD
0.0049 AU
Tisserand (Jupiter)
6.945

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
177
Data arc
29 days
First observed
16 September 2015
Last observed
15 October 2015
Residual RMS
0.28 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
25.3

Discovery & classification

Aten Near-Earth Object

Close approaches 74 on record

Flyby geometry
Ecliptic flyby of 2015 SA at 2029-04-09 16:18 UTC Top-down view of the ecliptic, Earth at the centre, for the 2029-04-09 16:18 UTC close approach of 2015 SA. Catalogue miss distance 148.7 LD · 5.72 × 10⁷ km. The curve is the geocentric path from 2029-04-06 to 2029-04-12, 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. Sun 148.7 LD · 5.72 × 10⁷ km 2029-04-09 16:18 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2029-04-09 16:18 UTC close approach of 2015 SA. Catalogue miss distance 148.7 LD · 5.72 × 10⁷ km. The curve is the geocentric path from 2029-04-06 to 2029-04-12, 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.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2027-11-18 22:49:00 Venus 0.1466 AU 57.1 LD 9.4 km/s
2029-04-09 16:18:00 Earth 0.3822 AU 148.7 LD 14.3 km/s
2030-12-13 05:02:00 Venus 0.143 AU 55.6 LD 10.8 km/s
2032-06-22 23:20:00 Earth 0.3545 AU 138.0 LD 6.9 km/s
2032-11-03 13:42:00 Earth 0.221 AU 86.0 LD 8.8 km/s
2035-09-13 12:38:00 Earth 0.1776 AU 69.1 LD 12.9 km/s
2036-02-26 22:56:00 Earth 0.3288 AU 128.0 LD 12.7 km/s
2039-05-01 10:09:00 Earth 0.3944 AU 153.5 LD 13.3 km/s
2039-11-08 14:22:00 Earth 0.4723 AU 183.8 LD 19.1 km/s
2042-09-28 19:29:00 Earth 0.1161 AU 45.2 LD 7.5 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources