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Centaur

2015 HX384

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(2015 HX384)

Where is it now

Distance from Sun
8.329 AU
True anomaly
202.19°
Distance from Earth
8.198 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 2015 HX384 — 8.329 AU from the Sun 2015 HX384
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 HX384 is 8.198 AU from Earth today (1.1 light-hours).

In the sky

Right ascension
07h 00m 58s
Declination
+20° 09′ 34″
Constellation
Gemini
Distance from Earth
8.19 AU
Elongation from the Sun
94.74° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
6.432 AU
Eccentricity
0.3456
Inclination
3.59°
Orbital period
16.31 years
Perihelion
4.209 AU
Aphelion
8.655 AU
Longitude of ascending node
233.75°
Argument of periapsis
21.53°
Epoch · J2000
2457131.5
Orbit class · CEN
Centaur
Earth MOID · 1,243.1 LD
3.1942 AU
Tisserand (Jupiter)
2.891

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
19
Data arc
3 days
First observed
18 April 2015
Last observed
21 April 2015
Residual RMS
0.04 ″
Solution · Otto Matic
1 August 2024

Visual & observation

Absolute magnitude (H)
15.69

Discovery & classification

Centaur

Sources