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Trans-Neptunian object

2017 BM239

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(2017 BM239)

Where is it now

Distance from Sun
42.959 AU
True anomaly
119.59°
Distance from Earth
43.948 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 2017 BM239 — 42.959 AU from the Sun 2017 BM239
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 BM239 is 43.948 AU from Earth today (6.1 light-hours).

In the sky

Right ascension
13h 12m 48s
Declination
-04° 08′ 08″
Constellation
Virgo
Distance from Earth
43.95 AU
Elongation from the Sun
7.55° — too close to the Sun to observe

Visible from both hemispheres.

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
41.245 AU
Eccentricity
0.1004
Inclination
6.24°
Orbital period
264.9 years
Perihelion
37.102 AU
Aphelion
45.387 AU
Longitude of ascending node
50.96°
Argument of periapsis
27.49°
Epoch · J2000
2457793.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,056.6 LD
36.1191 AU
Tisserand (Jupiter)
5.695

Orbit quality

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

Observations used
11
Data arc
24 days
First observed
30 January 2017
Last observed
23 February 2017
Residual RMS
1.31 ″
Solution · Otto Matic
20 June 2024

Visual & observation

Absolute magnitude (H)
8.57

Discovery & classification

TNO

Sources