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Centaur

2019 RF13

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(2019 RF13)

Where is it now

Distance from Sun
8.009 AU
True anomaly
179.32°
Distance from Earth
8.996 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 2019 RF13 — 8.009 AU from the Sun 2019 RF13
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2019 RF13 is 8.996 AU from Earth today (1.2 light-hours).

In the sky

Right ascension
12h 53m 49s
Declination
-00° 05′ 48″
Constellation
Virgo
Distance from Earth
8.99 AU
Elongation from the Sun
8.52° — 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
5.85 AU
Eccentricity
0.3689
Inclination
32.4°
Orbital period
14.15 years
Perihelion
3.692 AU
Aphelion
8.009 AU
Longitude of ascending node
182.26°
Argument of periapsis
191.65°
Epoch · J2000
2461200.5
Orbit class · CEN
Centaur
Earth MOID · 1,049.3 LD
2.6964 AU
Tisserand (Jupiter)
2.554

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
29
Data arc
57 days
First observed
4 September 2019
Last observed
31 October 2019
Residual RMS
0.47 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
15.8

Discovery & classification

Centaur

Close approaches 1 on record

When (UTC) Body Distance Lunar distances Relative speed
2040-03-31 10:39:00 Satrn 1.7296 AU 673.1 LD 5.1 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources