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Comet

Grauer

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C/2018 F1 (Grauer)

Grauer is a comet in the Comet orbit class. Its orbit takes it from 2.99 AU to 641.41 AU from the Sun; one orbit takes 5,783.7 years. Orbit from the JPL solution of 4 September 2021.

Where is it now

Distance from Sun
19.511 AU
True anomaly
134.52°
Distance from Earth
18.61 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 Grauer — 19.511 AU from the Sun Grauer
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Grauer is 18.61 AU from Earth today (2.6 light-hours).

In the sky

Right ascension
01h 26m 06s
Declination
-11° 56′ 49″
Constellation
Cetus
Distance from Earth
18.61 AU
Elongation from the Sun
154.31° — 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
322.204 AU
Eccentricity
0.9907
Inclination
46.07°
Orbital period
5,783.7 years
Perihelion
2.993 AU
Aphelion
641.414 AU
Longitude of ascending node
177.29°
Argument of periapsis
71.63°
Epoch · J2000
2458548.5
Orbit class · COM
Comet
Earth MOID · 902.6 LD
2.3194 AU
Tisserand (Jupiter)
1.501

Orbit quality

Observations used
221
Data arc
594 days
First observed
22 December 2017
Last observed
8 August 2019
Residual RMS
0.53 ″
Solution · Otto Matic
4 September 2021

Visual & observation

Absolute magnitude (H)
12.7
Total magnitude M₁ · K₁ 6.3
12.7

Discovery & classification

Also known as 2018 F1

Named

Sources