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Comet

Jacques

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C/2015 F4 (Jacques)

Jacques is a comet in the Comet orbit class. Its orbit takes it from 1.64 AU to 231.07 AU from the Sun; one orbit takes 1,255.1 years. Orbit from the JPL solution of 7 June 2022.

Where is it now

Distance from Sun
25.906 AU
True anomaly
152.44°
Distance from Earth
25.76 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 Jacques — 25.906 AU from the Sun Jacques
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Jacques is 25.76 AU from Earth today (3.6 light-hours).

In the sky

Right ascension
07h 38m 41s
Declination
+14° 46′ 45″
Constellation
Gemini
Distance from Earth
25.75 AU
Elongation from the Sun
98.09° — 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
116.355 AU
Eccentricity
0.9859
Inclination
48.7°
Orbital period
1,255.1 years
Perihelion
1.644 AU
Aphelion
231.066 AU
Longitude of ascending node
285.96°
Argument of periapsis
36.35°
Epoch · J2000
2457256.5
Orbit class · COM
Comet
Earth MOID · 284.7 LD
0.7317 AU
Tisserand (Jupiter)
1.09

Orbit quality

Observations used
2,837
Data arc
590 days
First observed
27 March 2015
Last observed
6 November 2016
Residual RMS
0.47 ″
Solution · Otto Matic
7 June 2022

Visual & observation

Absolute magnitude (H)
11.3
Total magnitude M₁ · K₁ 9.5
11.3

Discovery & classification

Also known as 2015 F4

Named

Sources