Skip to content
Public Universe
Trans-Neptunian object

2015 FG504

Add to an observing list or journal →

(2015 FG504)

Where is it now

Distance from Sun
40.304 AU
True anomaly
219.13°
Distance from Earth
41.174 AU
As of
15 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 2015 FG504 — 40.304 AU from the Sun 2015 FG504
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 FG504 is 41.174 AU from Earth today (5.7 light-hours).

In the sky

Right ascension
15h 19m 29s
Declination
-07° 41′ 18″
Constellation
Libra
Distance from Earth
41.18 AU
Elongation from the Sun
28.15° — near the Sun — look low at dusk or dawn

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
37.528 AU
Eccentricity
0.101
Inclination
19.99°
Orbital period
229.9 years
Perihelion
33.736 AU
Aphelion
41.32 AU
Longitude of ascending node
80.85°
Argument of periapsis
288.59°
Epoch · J2000
2457106.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,761.0 LD
32.7902 AU
Tisserand (Jupiter)
5.16

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
16
Data arc
9 days
First observed
20 March 2015
Last observed
29 March 2015
Residual RMS
0.47 ″
Solution · Otto Matic
14 May 2025

Visual & observation

Absolute magnitude (H)
8.18

Discovery & classification

TNO

Sources