The comet 123P/West-Hartley

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From Fairfield , 123P/West-Hartley is visible in the morning sky, becoming accessible at around 19:20, when it rises 21° above your north-eastern horizon. It will then reach its highest point in the sky at 01:14, 80° above your southern horizon. It will be lost to dawn twilight at around 05:31, 39° above your western horizon.

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Name 123P/West-Hartley
Object Type Comet
Current Position
Constellation:Ursa Major
Magnitude:13.46 (V)[1]
Right Ascension:11h32m [1]
Declination:+31°46' [1]
Distance:1.20 AU
9.97 lightmin [1]
Derived Quantities
Absolute Mag (V):44.64
Orbital Elements[1]
Semi-major axis:3.86 AU
Longitude ascending node:46.50°
Argument of perihelion:103.01°
Epoch of elements:16 February 2019
Mean Anomaly at epoch:1.55°
Derived quantities
Perihelion:2.13 AU
Aphelion:5.59 AU
Orbital period:7.58 years
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Additional sources

Magnitudes estimates are derived from observations sent into the BAA Comet Section, as compiled by Jonathan Shanklin and last updated on 4 February 2019. We use these amateur observations in preference to the MPC's magnitude estimates, since they are updated much more often. Nonetheless, all comets are intrinsically unpredictable objects, and future magnitude estimates must always be taken with a pinch of salt.




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