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Dwarf planet candidate

Salacia

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(120347) Salacia

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Where is it now

Distance from Sun
45.379 AU
True anomaly
142.86°
Distance from Earth
44.487 AU
As of
16 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 — 0.997 AU from the Sun Earth Salacia — 45.379 AU from the Sun Salacia
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Salacia is 44.487 AU from Earth today (6.2 light-hours).

In the sky

Right ascension
00h 02m 19s
Declination
+27° 02′ 19″
Constellation
Pegasus
Distance from Earth
44.49 AU
Elongation from the Sun
153.17° — well clear of the Sun

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
42.055 AU
Eccentricity
0.1046
Inclination
23.93°
Orbital period
272.7 years
Perihelion
37.656 AU
Aphelion
46.454 AU
Longitude of ascending node
280.25°
Argument of periapsis
308.98°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,281.6 LD
36.6974 AU
Tisserand (Jupiter)
5.292

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
751
Data arc
43.27 years
First observed
25 July 1982
Last observed
1 November 2025
Residual RMS
0.64 ″
Solution · Otto Matic
7 November 2025

Physical properties

Mean radius
423 km
Mass
4.92 × 10²⁰ kg
Rotation period
6.09 hours

Visual & observation

Geometric albedo
0.044
Absolute magnitude (H)
4.25

Discovery & classification

Discovered by
Roe, H. G., Brown, M. E., Barkume, K. M.
Discovery date
22 September 2004
Discovery site
Palomar

Salacia is the Roman goddess of the calm and sunlit ocean. At first afraid of Neptune's advances, she was convinced to agree to marriage by the dolphin Delphinus.

Also known as 120347 · 2004 SB60 · 120347 Salacia (2004 SB60)

Named TNO

Sources