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Comet

Maury-Attard

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C/2021 J1 (Maury-Attard)

Maury-Attard is a comet in the Halley-type comet orbit class. Its orbit takes it from 1.74 AU to 51.31 AU from the Sun; one orbit takes 136.6 years. Orbit from the JPL solution of 3 February 2022.

Where is it now

Distance from Sun
15.04 AU
True anomaly
146.16°
Distance from Earth
14.893 AU
As of
24 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 Maury-Attard — 15.04 AU from the Sun Maury-Attard
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Maury-Attard is 14.893 AU from Earth today (2.1 light-hours).

In the sky

Right ascension
06h 28m 41s
Declination
-44° 36′ 49″
Constellation
Puppis
Distance from Earth
14.89 AU
Elongation from the Sun
96.83° — well clear of the Sun

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
26.527 AU
Eccentricity
0.9344
Inclination
92.72°
Orbital period
136.6 years
Perihelion
1.741 AU
Aphelion
51.314 AU
Longitude of ascending node
88.32°
Argument of periapsis
147.33°
Epoch · J2000
2459331.5
Orbit class · HTC
Halley-type comet
Earth MOID · 321.6 LD
0.8264 AU
Tisserand (Jupiter)
0.12

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
106
Data arc
124 days
First observed
3 February 2021
Last observed
7 June 2021
Residual RMS
0.53 ″
Solution · Otto Matic
3 February 2022

Visual & observation

Absolute magnitude (H)
17.1
Total magnitude M₁ · K₁ 5.3
17.1

Discovery & classification

Also known as 2021 J1

Named

Sources