C/2021 A4 (NEOWISE) live position and data

This page shows Comet C/2021 A4 (NEOWISE) 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 A4 (NEOWISE) (less than 1.5 degrees):

StarHIP 20045004h 17m 55s-18° 30’ 25”
StarHIP 200578.23204h 18m 01s-17° 03’ 49”
StarHIP 196016.306604h 12m 00s-17° 16’ 28”
StarHIP 198206.863404h 15m 00s-16° 10’ 50”
StarHIP 202296.795404h 20m 09s-16° 26’ 14”
StarHIP 197288.524204h 13m 42s-17° 28’ 22”
StarHIP 199137.365604h 16m 18s-17° 52’ 29”
StarHIP 202608.083804h 20m 33s-17° 44’ 23”
StarHIP 198566.865204h 15m 26s-16° 26’ 42”
StarHIP 200328.18704h 17m 46s-16° 43’ 58”
StarHIP 199848.85104h 17m 09s-17° 26’ 56”
StarHIP 197527.0304h 14m 03s-15° 59’ 35”
StarHIP 201347.37404h 19m 00s-17° 51’ 03”
StarHIP 201147.394604h 18m 46s-17° 42’ 33”
StarHIP 202107.372404h 19m 53s-17° 27’ 50”
StarHIP 198398.349604h 15m 12s-16° 11’ 47”
StarHIP 202696.899804h 20m 41s-16° 49’ 48”

Additional resources

Additional Resources about Comet C/2021 A4 (NEOWISE)

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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