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Trans-Neptunian object

2011 HZ102

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(2011 HZ102)

Where is it now

Distance from Sun
43.2 AU
True anomaly
117.56°
Distance from Earth
43.214 AU
As of
19 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 — 0.996 AU from the Sun Earth 2011 HZ102 — 43.2 AU from the Sun 2011 HZ102
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2011 HZ102 is 43.214 AU from Earth today (6.0 light-hours).

In the sky

Right ascension
19h 46m 16s
Declination
-19° 40′ 58″
Constellation
Sagittarius
Distance from Earth
43.22 AU
Elongation from the Sun
88.23° — well clear of the Sun

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
43.027 AU
Eccentricity
0.0088
Inclination
2.4°
Orbital period
282.2 years
Perihelion
42.646 AU
Aphelion
43.407 AU
Longitude of ascending node
154.63°
Argument of periapsis
24.02°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 16,209.3 LD
41.6507 AU
Tisserand (Jupiter)
5.867

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
91
Data arc
6.23 years
First observed
28 April 2011
Last observed
21 July 2017
Residual RMS
0.1 ″
Solution · Otto Matic
15 March 2024

Visual & observation

Absolute magnitude (H)
8.58

Discovery & classification

TNO

Sources