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Comet

Jurlof-Achmarof-Hassel

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C/1939 H1 (Jurlof-Achmarof-Hassel)

Jurlof-Achmarof-Hassel is a comet in the Comet orbit class. Its orbit takes it from 0.53 AU to 123.81 AU from the Sun; one orbit takes 490.2 years. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
88.75 AU
True anomaly
175.28°
Distance from Earth
88.048 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 Jurlof-Achmarof-Hassel — 88.75 AU from the Sun Jurlof-Achmarof-Hassel
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Jurlof-Achmarof-Hassel is 88.048 AU from Earth today (12.2 light-hours).

In the sky

Right ascension
03h 55m 22s
Declination
-22° 47′ 01″
Constellation
Eridanus
Distance from Earth
88.05 AU
Elongation from the Sun
134.96° — 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
62.171 AU
Eccentricity
0.9915
Inclination
138.17°
Orbital period
490.2 years
Perihelion
0.528 AU
Aphelion
123.813 AU
Longitude of ascending node
312.35°
Argument of periapsis
89.15°
Epoch · J2000
2429390.5
Orbit class · COM
Comet
Earth MOID · 5.0 LD
0.0128 AU
Tisserand (Jupiter)
-0.586

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
14
Data arc
28 days
First observed
21 April 1939
Last observed
19 May 1939
Residual RMS
0.95 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
6
Total magnitude M₁ · K₁ 4.5
6

Discovery & classification

Also known as 1939 H1

Named

Sources