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Comet

Garradd

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C/2010 H1 (Garradd)

Garradd is a comet in the Comet orbit class. Its orbit takes it from 2.75 AU to 16,043.93 AU from the Sun; one orbit takes 718,688.4 years. Orbit from the JPL solution of 6 July 2022.

Where is it now

Distance from Sun
33.67 AU
True anomaly
146.85°
Distance from Earth
32.817 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 Garradd — 33.67 AU from the Sun Garradd
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Garradd is 32.817 AU from Earth today (4.5 light-hours).

In the sky

Right ascension
23h 52m 19s
Declination
+12° 45′ 25″
Constellation
Pegasus
Distance from Earth
32.82 AU
Elongation from the Sun
148.11° — well clear of the Sun

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
8,023.336 AU
Eccentricity
0.9997
Inclination
36.53°
Orbital period
718,688.4 years
Perihelion
2.745 AU
Aphelion
16,043.926 AU
Longitude of ascending node
347.38°
Argument of periapsis
233.82°
Epoch · J2000
2455319.5
Orbit class · COM
Comet
Earth MOID · 738.5 LD
1.8977 AU
Tisserand (Jupiter)
1.651

Orbit quality

Observations used
46
Data arc
133 days
First observed
19 February 2010
Last observed
2 July 2010
Residual RMS
0.71 ″
Solution · Otto Matic
6 July 2022

Visual & observation

Absolute magnitude (H)
9.5
Total magnitude M₁ · K₁ 17.5
9.5

Discovery & classification

Also known as 2010 H1

Named

Sources