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Trans-Neptunian object

2004 HA79

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(2004 HA79)

Where is it now

Distance from Sun
43.544 AU
True anomaly
128.12°
Distance from Earth
44.404 AU
As of
16 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 2004 HA79 — 43.544 AU from the Sun 2004 HA79
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2004 HA79 is 44.404 AU from Earth today (6.2 light-hours).

In the sky

Right ascension
15h 27m 24s
Declination
-07° 19′ 30″
Constellation
Libra
Distance from Earth
44.41 AU
Elongation from the Sun
29.38° — 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
39.297 AU
Eccentricity
0.2477
Inclination
22.71°
Orbital period
246.3 years
Perihelion
29.565 AU
Aphelion
49.029 AU
Longitude of ascending node
203.26°
Argument of periapsis
262.58°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,153.1 LD
28.6585 AU
Tisserand (Jupiter)
5.045

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
46
Data arc
19.79 years
First observed
26 April 2004
Last observed
9 February 2024
Residual RMS
0.18 ″
Solution · Otto Matic
11 March 2026

Visual & observation

Absolute magnitude (H)
6.94

Discovery & classification

TNO

Sources