Skip to content
Public Universe
Trans-Neptunian object

2026 HG18

Add to an observing list or journal →

(2026 HG18)

Where is it now

Distance from Sun
38.332 AU
True anomaly
322.36°
Distance from Earth
39.216 AU
As of
17 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 2026 HG18 — 38.332 AU from the Sun 2026 HG18
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2026 HG18 is 39.216 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
14h 02m 21s
Declination
-35° 31′ 12″
Constellation
Centaurus
Distance from Earth
39.22 AU
Elongation from the Sun
26.86° — 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
40.175 AU
Eccentricity
0.0565
Inclination
22.21°
Orbital period
254.7 years
Perihelion
37.905 AU
Aphelion
42.446 AU
Longitude of ascending node
306.77°
Argument of periapsis
312.07°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Tisserand (Jupiter)
5.266

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
11
Data arc
83 days
First observed
21 April 2026
Last observed
13 July 2026
Residual RMS
0.24 ″

Visual & observation

Absolute magnitude (H)
7.84

Discovery & classification

TNO

Sources