Skip to content
Public Universe
Comet

McNaught

Add to an observing list or journal →

C/2010 J2 (McNaught)

McNaught is a comet in the Comet orbit class. Its orbit takes it from 3.39 AU to 12,522.36 AU from the Sun; one orbit takes 495,642.5 years. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
33.202 AU
True anomaly
142.79°
Distance from Earth
33.661 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 McNaught — 33.202 AU from the Sun McNaught
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. McNaught is 33.661 AU from Earth today (4.7 light-hours).

In the sky

Right ascension
11h 06m 39s
Declination
+33° 33′ 32″
Constellation
Ursa Major
Distance from Earth
33.66 AU
Elongation from the Sun
62.26° — 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
6,262.872 AU
Eccentricity
0.9995
Inclination
125.85°
Orbital period
495,642.5 years
Perihelion
3.387 AU
Aphelion
12,522.357 AU
Longitude of ascending node
311.79°
Argument of periapsis
4.62°
Epoch · J2000
2455424.5
Orbit class · COM
Comet
Earth MOID · 923.9 LD
2.374 AU
Tisserand (Jupiter)
-1.336

Orbit quality

Observations used
543
Data arc
413 days
First observed
8 May 2010
Last observed
25 June 2011
Residual RMS
0.69 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
10.1
Total magnitude M₁ · K₁ 9.5
10.1

Discovery & classification

Also known as 2010 J2

Named

Sources