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Trans-Neptunian object

524179

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524179 (2001 FQ185)

524179 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 36.71 AU to 58.41 AU from the Sun; one orbit takes 328 years. Discovered 26 March 2001 by Buie, M. W.. Orbit from the JPL solution of 4 June 2024.

Where is it now

Distance from Sun
37.686 AU
True anomaly
30.6°
Distance from Earth
38.612 AU
As of
25 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 — 0.994 AU from the Sun Earth 524179 — 37.686 AU from the Sun 524179
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 524179 is 38.612 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
15h 26m 51s
Declination
-15° 33′ 59″
Constellation
Libra
Distance from Earth
38.61 AU
Elongation from the Sun
20.94° — near the Sun — look low at dusk or dawn

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.

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
47.563 AU
Eccentricity
0.2281
Inclination
3.24°
Orbital period
328 years
Perihelion
36.712 AU
Aphelion
58.414 AU
Longitude of ascending node
135.16°
Argument of periapsis
68.06°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,897.5 LD
35.7105 AU
Tisserand (Jupiter)
5.987

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
153
Data arc
25.07 years
First observed
20 March 1999
Last observed
14 April 2024
Residual RMS
0.61 ″
Solution · Otto Matic
4 June 2024

Visual & observation

Absolute magnitude (H)
6.89

Discovery & classification

Discovered by
Buie, M. W.
Discovery date
26 March 2001
Discovery site
Kitt Peak

Also known as 2001 FQ185

TNO

Sources