Comet C/2021 D1 (SWAN)
Comet C/2021 D1 (SWAN) is currently in the constellation of Sextans. The current Right Ascension of Comet C/2021 D1 (SWAN) is 10h 42m 15s and the Declination is -09° 57’ 52” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom ). The current estimated magnitude of Comet C/2021 D1 (SWAN) is 32.66 (JPL).
The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.
- C/2021 D1 (SWAN) is above the horizon from Greenwich, United Kingdom .
- Right now it is placed in the South-South-East direction at an altitude of 26° above the horizon.
- Given its current magnitude, C/2021 D1 (SWAN) is visible only through long exposure photography.
- Go to interactive sky chart
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Comet C/2021 D1 (SWAN) Position and Finder Charts
Below we provide Comet C/2021 D1 (SWAN) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.
Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2021 D1 (SWAN) is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Comet C/2021 D1 (SWAN)?, a page that provides all the information needed to find Comet C/2021 D1 (SWAN) in the sky and additional links to sky charts.
Comet C/2021 D1 (SWAN) Distance from Earth
The distance of Comet C/2021 D1 (SWAN) from Earth is currently 1,575,677,698 kilometers, equivalent to 10.532755 Astronomical Units. Light takes 1 hours, 27 minutes and 35.8951 seconds to travel from Comet C/2021 D1 (SWAN) and arrive to us.
The following chart shows the distance of Comet C/2021 D1 (SWAN) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.
The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2021 D1 (SWAN) from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest Approach of Comet C/2021 D1 (SWAN) to Earth
Between 1 January 2013 and 30 December 2100, the closest approach of Comet C/2021 D1 (SWAN) to Earth happens on Mon Mar 15 2021 at a distance of 1.676303 Astronomical Units, or 250,771,371 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Comet C/2021 D1 (SWAN) Brightness and Light Curve
The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2021 D1 (SWAN), according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
Comet C/2021 D1 (SWAN) Orbital Elements
|Perihelion distance||q||0.90179756 AU
|Date of perihelion transit||Tp||2021-Feb-27 14:36:45
|Next perihelion transit||2968-Mar-24 11:47
|Argument of perihelion||peri||72.222961880732°|
|Longitude of the ascending node||node||311.27122165418°|
Visualization of Comet C/2021 D1 (SWAN) Orbit
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2021 D1 (SWAN) with respect of the Sun and the orbits of the major planets. The position of Comet C/2021 D1 (SWAN) and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!
Comet C/2021 D1 (SWAN) 15 Days Ephemeris
The following table lists the ephemerides of Comet C/2021 D1 (SWAN) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2021 D1 (SWAN) in our Online Planetarium at the chosen date.
|2023 Sep 17||10h 39m 34s||-09° 35’ 00”||32.62||Sextans|
|2023 Sep 18||10h 39m 56s||-09° 38’ 03”||32.63||Sextans|
|2023 Sep 19||10h 40m 18s||-09° 41’ 08”||32.63||Sextans|
|2023 Sep 20||10h 40m 41s||-09° 44’ 12”||32.64||Sextans|
|2023 Sep 21||10h 41m 02s||-09° 47’ 17”||32.65||Sextans|
|2023 Sep 22||10h 41m 23s||-09° 50’ 23”||32.65||Sextans|
|2023 Sep 23||10h 41m 44s||-09° 53’ 30”||32.66||Sextans|
|2023 Sep 24||10h 42m 06s||-09° 56’ 39”||32.66||Sextans|
|2023 Sep 25||10h 42m 28s||-09° 59’ 47”||32.67||Sextans|
|2023 Sep 26||10h 42m 48s||-10° 02’ 56”||32.67||Sextans|
|2023 Sep 27||10h 43m 09s||-10° 06’ 06”||32.68||Sextans|
|2023 Sep 28||10h 43m 29s||-10° 09’ 15”||32.68||Sextans|
|2023 Sep 29||10h 43m 50s||-10° 12’ 26”||32.69||Sextans|
|2023 Sep 30||10h 44m 11s||-10° 15’ 38”||32.69||Sextans|