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Trans-Neptunian object

2004 HH79

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(2004 HH79)

Where is it now

Distance from Sun
41.929 AU
True anomaly
295.62°
Distance from Earth
42.533 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 2004 HH79 — 41.929 AU from the Sun 2004 HH79
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2004 HH79 is 42.533 AU from Earth today (5.9 light-hours).

In the sky

Right ascension
17h 11m 06s
Declination
-17° 48′ 25″
Constellation
Ophiuchus
Distance from Earth
42.54 AU
Elongation from the Sun
51.77° — 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
43.09 AU
Eccentricity
0.0564
Inclination
8.62°
Orbital period
282.9 years
Perihelion
40.658 AU
Aphelion
45.522 AU
Longitude of ascending node
222.4°
Argument of periapsis
101.69°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,433.1 LD
39.6563 AU
Tisserand (Jupiter)
5.802

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
26
Data arc
21.16 years
First observed
24 April 2004
Last observed
20 June 2025
Residual RMS
0.28 ″
Solution · Otto Matic
2 July 2025

Visual & observation

Absolute magnitude (H)
6.92

Discovery & classification

TNO

Sources