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Trans-Neptunian object

444025

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444025 (2004 HJ79)

Where is it now

Distance from Sun
44.037 AU
True anomaly
262.32°
Distance from Earth
44.936 AU
As of
20 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 444025 — 44.037 AU from the Sun 444025
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 444025 is 44.936 AU from Earth today (6.2 light-hours).

In the sky

Right ascension
15h 19m 52s
Declination
-18° 49′ 00″
Constellation
Libra
Distance from Earth
44.94 AU
Elongation from the Sun
24.56° — near the Sun — look low at dusk or dawn

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
43.862 AU
Eccentricity
0.0446
Inclination
3.32°
Orbital period
290.5 years
Perihelion
41.906 AU
Aphelion
45.818 AU
Longitude of ascending node
45.29°
Argument of periapsis
285.42°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,915.6 LD
40.896 AU
Tisserand (Jupiter)
5.91

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
74
Data arc
12.83 years
First observed
26 April 2004
Last observed
23 February 2017
Residual RMS
0.32 ″
Solution · Otto Matic
14 April 2021

Physical properties

Rotation period
7.5 hours

Visual & observation

Absolute magnitude (H)
7.18

Discovery & classification

Discovered by
Research and Education Collaborative Occultation Network
Discovery date
13 March 2013
Discovery site
Kitt Peak

Also known as 2004 HJ79

TNO

Sources