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Comet

Hermann

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275P/Hermann

Where is it now

Distance from Sun
1.65 AU
True anomaly
356.96°
Distance from Earth
2.419 AU
As of
22 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 — 0.995 AU from the Sun Earth Hermann — 1.65 AU from the Sun Hermann
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Hermann is 2.419 AU from Earth today (20.1 light-minutes).

In the sky

Right ascension
11h 59m 40s
Declination
+02° 35′ 02″
Constellation
Virgo
Distance from Earth
2.41 AU
Elongation from the Sun
31.44° — near the Sun — look low at dusk or dawn

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
5.765 AU
Eccentricity
0.7139
Inclination
21.57°
Orbital period
13.84 years
Perihelion
1.649 AU
Aphelion
9.88 AU
Longitude of ascending node
349.27°
Argument of periapsis
173.14°
Epoch · J2000
2453091.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 256.3 LD
0.6585 AU
Tisserand (Jupiter)
2.273

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
155
Data arc
14.09 years
First observed
15 February 1999
Last observed
18 March 2013
Residual RMS
0.68 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
15.5
Total magnitude M₁ · K₁ 14.8
15.5

Discovery & classification

Also known as 275P · 275P/1999 D1 · 275P/2012 Y2

Named

Close approaches 11 on record

When (UTC) Body Distance Lunar distances Relative speed
2056-04-02 02:15:00 Juptr 1.5567 AU 605.8 LD 11.4 km/s
2094-06-23 12:54:00 Juptr 1.8913 AU 736.0 LD 14.5 km/s
2139-03-07 03:25:00 Juptr 1.6319 AU 635.1 LD 10 km/s
2171-06-10 19:33:00 Satrn 0.1097 AU 42.7 LD 5.7 km/s
2171-06-10 19:33:00 Saturn 0.1097 AU 42.7 LD 5.7 km/s

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

Sources