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Trans-Neptunian object

2016 GR397

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(2016 GR397)

Where is it now

Distance from Sun
43.191 AU
True anomaly
305.95°
Distance from Earth
44.17 AU
As of
22 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 — 0.995 AU from the Sun Earth 2016 GR397 — 43.191 AU from the Sun 2016 GR397
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2016 GR397 is 44.17 AU from Earth today (6.1 light-hours).

In the sky

Right ascension
13h 14m 48s
Declination
-05° 38′ 43″
Constellation
Virgo
Distance from Earth
44.17 AU
Elongation from the Sun
11.1° — 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
46.221 AU
Eccentricity
0.1009
Inclination
2.43°
Orbital period
314.2 years
Perihelion
41.556 AU
Aphelion
50.886 AU
Longitude of ascending node
81.37°
Argument of periapsis
171.8°
Epoch · J2000
2457484.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,777.2 LD
40.5405 AU
Tisserand (Jupiter)
6.038

Orbit quality

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

Observations used
12
Data arc
13 days
First observed
2 April 2016
Last observed
15 April 2016
Residual RMS
1.54 ″
Solution · Otto Matic
2 July 2025

Visual & observation

Absolute magnitude (H)
7.58

Discovery & classification

TNO

Sources