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Asteroid

Artemis

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105 Artemis (A868 SA)

Where is it now

Distance from Sun
2.796 AU
True anomaly
182.58°
Distance from Earth
2.15 AU
As of
21 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.995 AU from the Sun Earth Artemis — 2.796 AU from the Sun Artemis
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Artemis is 2.15 AU from Earth today (17.9 light-minutes).

In the sky

Right ascension
05h 37m 42s
Declination
-00° 53′ 21″
Constellation
Orion
Distance from Earth
2.15 AU
Elongation from the Sun
121.1° — 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.

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
2.372 AU
Eccentricity
0.1791
Inclination
21.46°
Orbital period
3.65 years
Perihelion
1.947 AU
Aphelion
2.797 AU
Longitude of ascending node
188.21°
Argument of periapsis
56.91°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 391.6 LD
1.0063 AU
Tisserand (Jupiter)
3.43

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
5,272
Data arc
121.6 years
First observed
18 June 1904
Last observed
30 January 2026
Residual RMS
0.34 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
47 km
Rotation period
37.15 hours

Visual & observation

Geometric albedo
0.032
Absolute magnitude (H)
8.75
Colour index (B–V)
0.69
Spectral type (SMASS)
Ch
Spectral type (Tholen)
C
Colour index (U–B)
0.32

Discovery & classification

Discovered by
Watson, J. C.
Discovery date
16 September 1868
Discovery site
Ann Arbor

Also known as 105 · A868 SA

Main-Belt Asteroid Named

Sources