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Trans-Neptunian object

2015 FP401

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(2015 FP401)

Where is it now

Distance from Sun
39.737 AU
True anomaly
55.75°
Distance from Earth
40.716 AU
As of
18 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 2015 FP401 — 39.737 AU from the Sun 2015 FP401
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 FP401 is 40.716 AU from Earth today (5.6 light-hours).

In the sky

Right ascension
13h 06m 50s
Declination
-01° 38′ 22″
Constellation
Virgo
Distance from Earth
40.72 AU
Elongation from the Sun
10.68° — 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
41.816 AU
Eccentricity
0.0808
Inclination
23.88°
Orbital period
270.4 years
Perihelion
38.438 AU
Aphelion
45.194 AU
Longitude of ascending node
183.98°
Argument of periapsis
317.12°
Epoch · J2000
2457128.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,589.5 LD
37.4886 AU
Tisserand (Jupiter)
5.292

Orbit quality

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

Observations used
16
Data arc
66 days
First observed
18 March 2015
Last observed
23 May 2015
Residual RMS
0.12 ″
Solution · Otto Matic
2 July 2025

Visual & observation

Absolute magnitude (H)
8.39

Discovery & classification

TNO

Sources