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C/2021 D1 (SWAN) live position and data

This page shows Comet C/2021 D1 (SWAN) location and other relevant astronomical data in real time. The celestial coordinates, magnitude, distances and speed are updated in real time and are computed using high quality data sets provided by the JPL Horizons ephemeris service (see acknowledgements for details). The sky map shown below represents a rectangular portion of the sky 60x40 arcminutes wide. By comparison the diameter of the full Moon is about 30 arcmins, so the full horizontal extent of the map is approximately 2 full Moons wide. Depending on the device you are using, the map can be dragged horizondally or vertically using the mouse or touchscreen. The deep sky image in the background is provided by the Digitized Sky Survey (acknowledgements).

Current close conjunctions

List of bright objects (stars brighter than magnitude 9.0 and galaxies brighter than magmitude 14.0) close to Comet C/2021 D1 (SWAN) (less than 1.5 degrees):

TypeNameMagnitudeArDec
StarHIP 49910010h 11m 23s-01° 39’ 44”
StarHIP 49969010h 12m 04s-02° 40’ 59”
StarHIP 495408.42110h 06m 53s-01° 43’ 25”
StarHIP 503437.548810h 16m 46s-02° 47’ 50”
StarHIP 503228.090610h 16m 34s-02° 36’ 06”
StarHIP 503548.967810h 16m 55s-01° 25’ 01”
StarHIP 496437.538810h 07m 56s-02° 31’ 21”
StarHIP 501777.989810h 14m 33s-01° 07’ 36”
StarHIP 502917.705810h 16m 07s-01° 35’ 51”
StarHIP 497537.783410h 09m 22s-01° 40’ 05”
StarHIP 498717.50810h 11m 01s-02° 24’ 54”
StarHIP 502758.672810h 15m 55s-02° 24’ 51”
StarHIP 501878.10710h 14m 42s-02° 52’ 33”
GalaxyUGC 551513.910h 13m 38s-00° 55’ 33”

Additional resources

Additional Resources about Comet C/2021 D1 (SWAN)

Astronomy databases

This online sky chart is created using the following astronomy databases and services:

  1. The Digitized Sky Survey, a photographic survey of the whole sky created using images from different telescopes, including the Oschin Schmidt Telescope on Palomar Mountain
  2. The Hipparcos Star Catalogue, containing more than 100.000 bright stars
  3. The PGC 2003 Catalogue, containing information about 1 million galaxies
  4. The GSC 2.3 Catalogue, containing information about more than 2 billion stars and galaxies
Please see the acknowledgements section.

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