Skip to content
Public Universe
Trans-Neptunian object

654569

Add to an observing list or journal →

654569 (2015 BA519)

Where is it now

Distance from Sun
31.875 AU
True anomaly
34.92°
Distance from Earth
32.759 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 654569 — 31.875 AU from the Sun 654569
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 654569 is 32.759 AU from Earth today (4.5 light-hours).

In the sky

Right ascension
15h 14m 46s
Declination
-15° 15′ 34″
Constellation
Libra
Distance from Earth
32.76 AU
Elongation from the Sun
26.52° — near the Sun — look low at dusk or dawn

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
39.385 AU
Eccentricity
0.2166
Inclination
2.81°
Orbital period
247.2 years
Perihelion
30.853 AU
Aphelion
47.917 AU
Longitude of ascending node
152.75°
Argument of periapsis
43.52°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,618.1 LD
29.8534 AU
Tisserand (Jupiter)
5.497

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
121
Data arc
24.01 years
First observed
22 May 2001
Last observed
27 May 2025
Residual RMS
0.63 ″
Solution · Otto Matic
1 August 2025

Physical properties

Rotation period
8 hours

Visual & observation

Absolute magnitude (H)
7.74

Discovery & classification

Discovered by
Pan-STARRS 1
Discovery date
26 January 2015
Discovery site
Haleakala

Also known as 2015 BA519

TNO

Sources