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 in the background 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):

Type	Name	Magnitude	Ar	Dec
Star	HIP 108215	8.5524	21h 55m 22s	-30° 02’ 05”
Star	HIP 108259	6.3274	21h 55m 55s	-30° 36’ 21”
Star	HIP 108264	7.9554	21h 55m 59s	-30° 55’ 24”
Star	HIP 108328	7.8294	21h 56m 47s	-28° 49’ 03”
Star	HIP 108474	8.9356	21h 58m 28s	-29° 44’ 19”
Star	HIP 108241	8.3972	21h 55m 41s	-29° 42’ 20”
Star	HIP 107927	7.847	21h 51m 58s	-30° 18’ 59”
Star	HIP 108565	6.9504	21h 59m 30s	-29° 03’ 23”
Star	HIP 108416	8.8904	21h 57m 49s	-29° 06’ 57”
Star	HIP 108579	8.6164	21h 59m 43s	-29° 58’ 54”
Galaxy	ESO 466-21	13.4	21h 57m 54s	-28° 48’ 28”
Galaxy	IC 5139	13.3	21h 50m 25s	-30° 59’ 39”

Additional resources

• 15 Days Ephemerides
• Interactive Sky Map (Planetarium)
• Rise & Set Times
• Distance from Earth
• Light Curve
• Orbital Elements

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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