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Comet Near-Earth

SWAN-Xingming

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C/2015 F5 (SWAN-Xingming)

Where is it now

Distance from Sun
22.56 AU
True anomaly
172.63°
Distance from Earth
22.481 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.

Sun Earth — 0.998 AU from the Sun Earth SWAN-Xingming — 22.56 AU from the Sun SWAN-Xingming
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. SWAN-Xingming is 22.481 AU from Earth today (3.1 light-hours).

In the sky

Right ascension
07h 04m 03s
Declination
+19° 31′ 03″
Constellation
Gemini
Distance from Earth
22.47 AU
Elongation from the Sun
93.86° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
15.55 AU
Eccentricity
0.9777
Inclination
149.26°
Orbital period
61.32 years
Perihelion
0.346 AU
Aphelion
30.754 AU
Longitude of ascending node
287.74°
Argument of periapsis
13.39°
Epoch · J2000
2457134.5
Orbit class · HTC
Halley-type comet
Earth MOID · 171.8 LD
0.4416 AU
Tisserand (Jupiter)
-0.289

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
209
Data arc
43 days
First observed
5 April 2015
Last observed
18 May 2015
Residual RMS
0.91 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
14.1
Total magnitude M₁ · K₁ 4.5
14.1

Discovery & classification

Also known as 2015 F5

Near-Earth Object Named

Sources