Skip to content
Public Universe
Trans-Neptunian object

2015 GP55

Add to an observing list or journal →

(2015 GP55)

Where is it now

Distance from Sun
39.51 AU
True anomaly
218.34°
Distance from Earth
40.454 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 GP55 — 39.51 AU from the Sun 2015 GP55
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 GP55 is 40.454 AU from Earth today (5.6 light-hours).

In the sky

Right ascension
14h 37m 00s
Declination
-11° 25′ 33″
Constellation
Libra
Distance from Earth
40.46 AU
Elongation from the Sun
17.9° — too close to the Sun to observe

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
36.34 AU
Eccentricity
0.1188
Inclination
10.38°
Orbital period
219.1 years
Perihelion
32.022 AU
Aphelion
40.659 AU
Longitude of ascending node
199.58°
Argument of periapsis
163.32°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,072.0 LD
31.0196 AU
Tisserand (Jupiter)
5.305

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
39
Data arc
7.36 years
First observed
17 February 2015
Last observed
29 June 2022
Residual RMS
0.21 ″
Solution · Otto Matic
6 March 2025

Visual & observation

Absolute magnitude (H)
8.45

Discovery & classification

TNO

Sources