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Trans-Neptunian object

2017 BP239

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(2017 BP239)

Where is it now

Distance from Sun
43.243 AU
True anomaly
178.47°
Distance from Earth
44.233 AU
As of
16 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 — 0.997 AU from the Sun Earth 2017 BP239 — 43.243 AU from the Sun 2017 BP239
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 BP239 is 44.233 AU from Earth today (6.1 light-hours).

In the sky

Right ascension
13h 09m 12s
Declination
-03° 36′ 11″
Constellation
Virgo
Distance from Earth
44.23 AU
Elongation from the Sun
7.37° — 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
39.303 AU
Eccentricity
0.1003
Inclination
4.56°
Orbital period
246.4 years
Perihelion
35.361 AU
Aphelion
43.245 AU
Longitude of ascending node
146.35°
Argument of periapsis
232.45°
Epoch · J2000
2457779.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,373.7 LD
34.3644 AU
Tisserand (Jupiter)
5.584

Orbit quality

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

Observations used
9
Data arc
5 days
First observed
23 January 2017
Last observed
28 January 2017
Residual RMS
1.29 ″
Solution · Otto Matic
20 June 2024

Visual & observation

Absolute magnitude (H)
7.84

Discovery & classification

TNO

Sources