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Comet

LINEAR

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C/2003 G2 (LINEAR)

LINEAR is a comet in the Comet orbit class. Its orbit takes it from 1.55 AU to 864.69 AU from the Sun; one orbit takes 9,014.1 years. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
44.11 AU
True anomaly
158.91°
Distance from Earth
43.139 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 LINEAR — 44.11 AU from the Sun LINEAR
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. LINEAR is 43.139 AU from Earth today (6.0 light-hours).

In the sky

Right ascension
01h 50m 03s
Declination
+00° 00′ 04″
Constellation
Cetus
Distance from Earth
43.14 AU
Elongation from the Sun
167.38° — near opposition — up most of the night

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
433.122 AU
Eccentricity
0.9964
Inclination
96.17°
Orbital period
9,014.1 years
Perihelion
1.553 AU
Aphelion
864.692 AU
Longitude of ascending node
24.57°
Argument of periapsis
190.67°
Epoch · J2000
2452744.5
Orbit class · COM
Comet
Earth MOID · 218.3 LD
0.5609 AU
Tisserand (Jupiter)
-0.154

Orbit quality

Observations used
112
Data arc
53 days
First observed
3 April 2003
Last observed
26 May 2003
Residual RMS
0.74 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
16.7
Total magnitude M₁ · K₁ 10
16.7

Discovery & classification

Also known as 2003 G2

Named

Sources