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Comet

Nagata

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C/1931 O1 (Nagata)

Nagata is a comet in the Comet orbit class. Its orbit takes it from 1.05 AU to 96.05 AU from the Sun; one orbit takes 338.3 years. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
84.171 AU
True anomaly
175.48°
Distance from Earth
83.673 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 Nagata — 84.171 AU from the Sun Nagata
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Nagata is 83.673 AU from Earth today (11.6 light-hours).

In the sky

Right ascension
21h 47m 57s
Declination
+16° 53′ 19″
Constellation
Pegasus
Distance from Earth
83.68 AU
Elongation from the Sun
119.33° — well clear of the Sun

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
48.55 AU
Eccentricity
0.9785
Inclination
42.3°
Orbital period
338.3 years
Perihelion
1.046 AU
Aphelion
96.054 AU
Longitude of ascending node
192.25°
Argument of periapsis
320.09°
Epoch · J2000
2426619.5
Orbit class · COM
Comet
Earth MOID · 63.1 LD
0.1621 AU
Tisserand (Jupiter)
1.04

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
33
Data arc
87 days
First observed
12 August 1931
Last observed
7 November 1931
Residual RMS
0.9 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
5.7
Total magnitude M₁ · K₁ 4.8
5.7

Discovery & classification

Also known as 1931 O1

Named

Sources