Ephemeris Calculator

Compute Comet 17P/Holmes ephemerides

Time: : UTC

Where is Comet 17P/Holmes?

Below the horizon. Rise: 13:33 | Tran: 18:31 | Set: 23:29

Alt: -39.20° Az: 52.87° Direction: North-East

Comet 17P/Holmes is currently in the constellation of Crater. The current Right Ascension is 11h 31m 54s and the Declination is -11° 43’ 16”.

Right now, from Greenwich, UK [Change Location], Comet 17P/Holmes is not visible because it is below the horizon. You can check Comet 17P/Holmes Rise and Set Times to know when Comet 17P/Holmes will rise from your location.

Apparent coordinates:

Right Ascension 11h 31m 54s

Declination -11° 43’ 16”

Hour Angle 14h 36m 29s

Sidereal Time 02h 08m 24s

Map showing Comet 17P/Holmes in Crater on June, 21 2025
Field of view: 50x30 degrees
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Comet 17P/Holmes: Complete reference information on TheSkyLive.com.
Where is Comet 17P/Holmes?: Key information on where to find Comet 17P/Holmes in the sky.
Distance from Earth: Find out how far Comet 17P/Holmes is from Earth right now.
How Bright is Comet 17P/Holmes?: Current visual brightness (magnitude) and apparent size.
Rise and Set Times: Rise and set times of Comet 17P/Holmes from your location.
Interactive Sky Map: Planetarium-style interactive visualization of Comet 17P/Holmes's position in the sky.
Live Position Tracker: High precision position tracker with deep space imagery.
Ephemeris: 15 days Comet 17P/Holmes's computed ephemeris.