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Centaur

2015 AR284

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(2015 AR284)

Where is it now

Distance from Sun
6.289 AU
True anomaly
228.99°
Distance from Earth
6.281 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 AR284 — 6.289 AU from the Sun 2015 AR284
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 AR284 is 6.281 AU from Earth today (52.2 light-minutes).

In the sky

Right ascension
19h 07m 19s
Declination
-33° 17′ 22″
Constellation
Sagittarius
Distance from Earth
6.29 AU
Elongation from the Sun
85.3° — well clear of the Sun

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
5.973 AU
Eccentricity
0.6033
Inclination
10.68°
Orbital period
14.6 years
Perihelion
2.37 AU
Aphelion
9.577 AU
Longitude of ascending node
22.92°
Argument of periapsis
41.57°
Epoch · J2000
2461200.5
Orbit class · CEN
Centaur
Earth MOID · 542.6 LD
1.3944 AU
Tisserand (Jupiter)
2.55

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
33
Data arc
596 days
First observed
1 September 2013
Last observed
20 April 2015
Residual RMS
0.43 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
15.8

Discovery & classification

Centaur

Close approaches 6 on record

When (UTC) Body Distance Lunar distances Relative speed
2056-10-18 03:48:00 Juptr 0.8193 AU 318.8 LD 8.3 km/s
2147-01-07 16:56:00 Juptr 0.6624 AU 257.8 LD 6.9 km/s

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

Sources