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Trans-Neptunian object

2006 HG123

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(2006 HG123)

Where is it now

Distance from Sun
35.573 AU
True anomaly
248.09°
Distance from Earth
36.324 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 2006 HG123 — 35.573 AU from the Sun 2006 HG123
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2006 HG123 is 36.324 AU from Earth today (5.0 light-hours).

In the sky

Right ascension
16h 05m 53s
Declination
-05° 01′ 55″
Constellation
Ophiuchus
Distance from Earth
36.33 AU
Elongation from the Sun
40.21° — 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
34.589 AU
Eccentricity
0.1005
Inclination
27°
Orbital period
203.4 years
Perihelion
31.114 AU
Aphelion
38.064 AU
Longitude of ascending node
207.53°
Argument of periapsis
148.93°
Epoch · J2000
2453862.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,729.0 LD
30.1383 AU
Tisserand (Jupiter)
4.722

Orbit quality

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

Observations used
12
Data arc
55 days
First observed
26 April 2006
Last observed
20 June 2006
Residual RMS
0.53 ″
Solution · Otto Matic
29 November 2022

Visual & observation

Absolute magnitude (H)
7.58

Discovery & classification

TNO

Sources