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Trans-Neptunian object

2015 BW629

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(2015 BW629)

2015 BW629 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 35.73 AU to 58.85 AU from the Sun; one orbit takes 325.2 years. Orbit from the JPL solution of 5 June 2026.

Where is it now

Distance from Sun
51.323 AU
True anomaly
123.14°
Distance from Earth
51.717 AU
As of
25 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 — 0.994 AU from the Sun Earth 2015 BW629 — 51.323 AU from the Sun 2015 BW629
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 BW629 is 51.717 AU from Earth today (7.2 light-hours).

In the sky

Right ascension
09h 35m 34s
Declination
-03° 10′ 35″
Constellation
Hydra
Distance from Earth
51.72 AU
Elongation from the Sun
66.21° — well clear of the Sun

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
47.289 AU
Eccentricity
0.2445
Inclination
19.42°
Orbital period
325.2 years
Perihelion
35.725 AU
Aphelion
58.853 AU
Longitude of ascending node
268.02°
Argument of periapsis
116.57°
Epoch · J2000
2457011.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,533.6 LD
34.7753 AU
Tisserand (Jupiter)
5.624

Orbit quality

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

Observations used
14
Data arc
58 days
First observed
24 November 2014
Last observed
21 January 2015
Residual RMS
0.11 ″
Solution · Otto Matic
5 June 2026

Visual & observation

Absolute magnitude (H)
8.51

Discovery & classification

TNO

Sources