Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Comet C/2015 B1 (PANSTARRS)

Comet C/2015 B1 (PANSTARRS) is currently in the constellation of Sagittarius. The current Right Ascension of Comet C/2015 B1 (PANSTARRS) is 19h 48m 41s and the Declination is -35° 46’ 50” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2015 B1 (PANSTARRS) is 23.44 (JPL).

Summary of key facts about Comet C/2015 B1 (PANSTARRS) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

19h 48m 41s
-35° 46’ 50”

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Comet C/2015 B1 (PANSTARRS) available on TheSkyLive:

Available Resources

Comet C/2015 B1 (PANSTARRS) Position and Finder Charts

Below we provide Comet C/2015 B1 (PANSTARRS) 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.

Map showing Comet C/2015 B1 (PANSTARRS) in Sagittarius on January, 19 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2015 B1 (PANSTARRS) in Sagittarius on January, 19 2021
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2015 B1 (PANSTARRS) is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 19h 48m 41s
Dec: -35° 46’ 50”
Deep sky finder chart for Comet C/2015 B1 (PANSTARRS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2015 B1 (PANSTARRS)?, a page that provides all the information needed to find Comet C/2015 B1 (PANSTARRS) in the sky and additional links to sky charts.

Comet C/2015 B1 (PANSTARRS) Distance from Earth

The distance of Comet C/2015 B1 (PANSTARRS) from Earth is currently 1,532,964,006 kilometers, equivalent to 10.247231 Astronomical Units. Light takes 1 hours, 25 minutes and 13.4175 seconds to travel from Comet C/2015 B1 (PANSTARRS) and arrive to us.

1 hours, 25 minutes and 13.4175 seconds

The following chart shows the distance of Comet C/2015 B1 (PANSTARRS) 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.

Distance of Comet C/2015 B1 (PANSTARRS) from Earth between January 2013 and December 2100

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/2015 B1 (PANSTARRS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2015 B1 (PANSTARRS) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2015 B1 (PANSTARRS) to Earth happens on Sat Apr 1 2045 at a distance of 5.030677 Astronomical Units, or 752,578,587 kilometers:

Sat Apr 1 2045

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2015 B1 (PANSTARRS) brightness

The current visual magnitude of Comet C/2015 B1 (PANSTARRS) is 23.44.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated 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.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2015 B1 (PANSTARRS), 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.

Predicted magnitude of Comet C/2015 B1 (PANSTARRS) between January 2013 and December 2100

Comet C/2015 B1 (PANSTARRS) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Comet C/2015 B1 (PANSTARRS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 125.8°
Max altitude: 2.7°
Azimuth: 234.2°

The rise and set times are defined as the time at which the upper limb of Comet C/2015 B1 (PANSTARRS) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2015 B1 (PANSTARRS) Orbital Elements

The following table lists the orbital elements of Comet C/2015 B1 (PANSTARRS) at epoch 19 March 2015 00:00 UTC (JD: 2457101.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.38244480
Orbit inclination i 18.02772980°
Perihelion distance q 5.97563765 AU
893,942,670 km
Aphelion distance Q 13.37692444 AU
2,001,159,417 km
Semi-major axis a 9.67628104 AU
1,447,551,043 km
Orbital period period 30.1000 years
10,994.1368 days
Date of perihelion transit Tp 2015-Sep-19 17:29:24
2,457,285.2288 JD
Next perihelion transit 2045-Oct-25 20:46
2,468,279.3656 JD
Argument of perihelion peri 188.27415326684°
Longitude of the ascending node node 353.35565530218°
Mean anomaly M 353.9838523387°
Mean motion n 0.03274473°/day

Visualization of Comet C/2015 B1 (PANSTARRS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2015 B1 (PANSTARRS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2015 B1 (PANSTARRS) 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!

Orbit Diagram of Comet C/2015 B1 (PANSTARRS)
View Comet C/2015 B1 (PANSTARRS) in the 3D Solar System Simulator

Comet C/2015 B1 (PANSTARRS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2015 B1 (PANSTARRS) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2015 B1 (PANSTARRS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 12 19h 43m 51s -35° 59’ 04” 23.43 Sagittarius
2021 Jan 13 19h 44m 29s -35° 57’ 29” 23.43 Sagittarius
2021 Jan 14 19h 45m 06s -35° 55’ 53” 23.43 Sagittarius
2021 Jan 15 19h 45m 42s -35° 54’ 19” 23.44 Sagittarius
2021 Jan 16 19h 46m 18s -35° 52’ 45” 23.44 Sagittarius
2021 Jan 17 19h 46m 55s -35° 51’ 12” 23.44 Sagittarius
2021 Jan 18 19h 47m 33s -35° 49’ 41” 23.44 Sagittarius
2021 Jan 19 19h 48m 08s -35° 48’ 10” 23.44 Sagittarius
2021 Jan 20 19h 48m 46s -35° 46’ 40” 23.44 Sagittarius
2021 Jan 21 19h 49m 23s -35° 45’ 11” 23.44 Sagittarius
2021 Jan 22 19h 49m 59s -35° 43’ 42” 23.44 Sagittarius
2021 Jan 23 19h 50m 35s -35° 42’ 15” 23.44 Sagittarius
2021 Jan 24 19h 51m 11s -35° 40’ 50” 23.44 Sagittarius
2021 Jan 25 19h 51m 47s -35° 39’ 24” 23.45 Sagittarius