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Comet Near-Earth

SOHO

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C/2015 D1 (SOHO)

Where is it now

Distance from Sun
3.236 AU
True anomaly
171.17°
Distance from Earth
3.475 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth SOHO — 3.236 AU from the Sun SOHO
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. SOHO is 3.475 AU from Earth today (28.9 light-minutes).

In the sky

Right ascension
10h 31m 51s
Declination
+51° 58′ 59″
Constellation
Ursa Major
Distance from Earth
3.47 AU
Elongation from the Sun
68.42° — 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
4.989 AU
Eccentricity
0.9943
Inclination
69.62°
Orbital period
11.14 years
Perihelion
0.028 AU
Aphelion
9.95 AU
Longitude of ascending node
95.88°
Argument of periapsis
234.96°
Epoch · J2000
2457073.5
Orbit class · JFC
Jupiter-family comet (2 < T_J < 3)
Earth MOID · 200.7 LD
0.5158 AU
Tisserand (Jupiter)
1.116

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
417
Data arc
3 days
First observed
18 February 2015
Last observed
21 February 2015
Residual RMS
0.54 ″
Solution · Otto Matic
16 April 2021

Visual & observation

Absolute magnitude (H)
10
Total magnitude M₁ · K₁ 4.5
10

Discovery & classification

Also known as 2015 D1

Near-Earth Object Named

Sources