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Centaur

2018 JB15

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(2018 JB15)

Where is it now

Distance from Sun
7.239 AU
True anomaly
192.15°
Distance from Earth
6.694 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 2018 JB15 — 7.239 AU from the Sun 2018 JB15
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2018 JB15 is 6.694 AU from Earth today (55.7 light-minutes).

In the sky

Right ascension
04h 53m 06s
Declination
+41° 47′ 56″
Constellation
Auriga
Distance from Earth
6.68 AU
Elongation from the Sun
120.31° — 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
6.048 AU
Eccentricity
0.2039
Inclination
21.89°
Orbital period
14.87 years
Perihelion
4.815 AU
Aphelion
7.281 AU
Longitude of ascending node
17.72°
Argument of periapsis
222.01°
Epoch · J2000
2461200.5
Orbit class · CEN
Centaur
Earth MOID · 1,494.4 LD
3.8401 AU
Tisserand (Jupiter)
2.819

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
13
Data arc
43 days
First observed
2 May 2018
Last observed
14 June 2018
Residual RMS
0.17 ″
Solution · Otto Matic
9 July 2024

Visual & observation

Absolute magnitude (H)
15.19

Discovery & classification

Centaur

Sources