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Centaur

2015 HO176

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(2015 HO176)

Where is it now

Distance from Sun
5.399 AU
True anomaly
238.55°
Distance from Earth
5.595 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 HO176 — 5.399 AU from the Sun 2015 HO176
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 HO176 is 5.595 AU from Earth today (46.5 light-minutes).

In the sky

Right ascension
08h 35m 46s
Declination
+24° 54′ 59″
Constellation
Cancer
Distance from Earth
5.58 AU
Elongation from the Sun
74.16° — 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
5.675 AU
Eccentricity
0.5802
Inclination
8.78°
Orbital period
13.52 years
Perihelion
2.383 AU
Aphelion
8.968 AU
Longitude of ascending node
69.12°
Argument of periapsis
167.3°
Epoch · J2000
2461200.5
Orbit class · CEN
Centaur
Earth MOID · 534.0 LD
1.372 AU
Tisserand (Jupiter)
2.598

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
93
Data arc
172 days
First observed
28 January 2015
Last observed
19 July 2015
Residual RMS
0.52 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
16.7

Discovery & classification

Centaur

Close approaches 10 on record

When (UTC) Body Distance Lunar distances Relative speed
2057-10-21 17:13:00 Juptr 0.7876 AU 306.5 LD 7.5 km/s
2088-10-19 04:41:00 Saturn 0.3765 AU 146.5 LD 3.9 km/s
2088-10-19 04:41:00 Satrn 0.3765 AU 146.5 LD 3.9 km/s
2120-10-29 11:01:00 Juptr 1.3458 AU 523.7 LD 11.7 km/s
2164-07-12 02:23:00 Juptr 1.2032 AU 468.2 LD 5.9 km/s
2176-12-20 11:10:00 Juptr 1.9566 AU 761.5 LD 13.6 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources