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Comet

Holvorcem

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C/2013 D1 (Holvorcem)

Where is it now

Distance from Sun
18.902 AU
True anomaly
169.67°
Distance from Earth
18.101 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 Holvorcem — 18.902 AU from the Sun Holvorcem
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Holvorcem is 18.101 AU from Earth today (2.5 light-hours).

In the sky

Right ascension
23h 27m 08s
Declination
+06° 36′ 20″
Constellation
Pisces
Distance from Earth
18.1 AU
Elongation from the Sun
142.46° — 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
11.227 AU
Eccentricity
0.7809
Inclination
10.09°
Orbital period
37.62 years
Perihelion
2.46 AU
Aphelion
19.994 AU
Longitude of ascending node
294.97°
Argument of periapsis
252.63°
Epoch · J2000
2456377.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 578.1 LD
1.4854 AU
Tisserand (Jupiter)
2.27

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
118
Data arc
113 days
First observed
16 February 2013
Last observed
9 June 2013
Residual RMS
0.51 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
13.5
Total magnitude M₁ · K₁ 10
13.5

Discovery & classification

Also known as 2013 D1

Named

Close approaches 1 on record

When (UTC) Body Distance Lunar distances Relative speed
2091-10-30 17:28:00 Juptr 0.9112 AU 354.6 LD 14.2 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources