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Comet

Robinson

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C/2020 H5 (Robinson)

Robinson is a comet in the Comet orbit class. Its orbit takes it from 9.35 AU to 6,843.53 AU from the Sun; one orbit takes 200,572.8 years. Orbit from the JPL solution of 8 May 2025.

Where is it now

Distance from Sun
14.786 AU
True anomaly
74.75°
Distance from Earth
15.554 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 Robinson — 14.786 AU from the Sun Robinson
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Robinson is 15.554 AU from Earth today (2.2 light-hours).

In the sky

Right ascension
15h 35m 14s
Declination
+17° 59′ 39″
Constellation
Serpens
Distance from Earth
15.56 AU
Elongation from the Sun
38.07° — near the Sun — look low at dusk or dawn

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
3,426.436 AU
Eccentricity
0.9973
Inclination
70.23°
Orbital period
200,572.8 years
Perihelion
9.345 AU
Aphelion
6,843.527 AU
Longitude of ascending node
210.63°
Argument of periapsis
326.4°
Epoch · J2000
2459533.5
Orbit class · COM
Comet
Earth MOID · 3,300.6 LD
8.481 AU
Tisserand (Jupiter)
1.283

Orbit quality

Observations used
292
Data arc
9.38 years
First observed
14 December 2015
Last observed
2 May 2025
Residual RMS
0.47 ″
Solution · Otto Matic
8 May 2025

Visual & observation

Absolute magnitude (H)
6.7
Total magnitude M₁ · K₁ 8
6.7

Discovery & classification

Also known as 2020 H5

Named

Sources