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public  Kipséli, Grecia Kipséli, Grecia  ⓘ
TimezoneEurope/Athens
Sunrise: 6:07 
Transit: 13:29 
Sunset: 20:50
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Comets » 

Comet C/1910 A1 (Great January Comet)

Below the horizon.  Rise: 20:25 | Tran: 2:44 | Set: 9:08
Alt: -34.73°   Az: 43.32°   Direction: North-East

Comet C/1910 A1 (Great January Comet) is in the constellation of Aquila, at a distance of 19,190,632,829.0 kilometers from Earth. The current Right Ascension is 20h 04m 55s and the Declination is +06° 54’ 54” (apparent coordinates).

Finder Charts

The sky charts below show, at different resolutions, the position of comet C/1910 A1 (Great January Comet) in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of comet C/1910 A1 (Great January Comet) in the constellation of Aquila on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of comet C/1910 A1 (Great January Comet) in the constellation of Aquila on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

The following map uses photographic imagery from the Digitized Sky Survey (DSS) to realistically visualize the precise position of comet C/1910 A1 (Great January Comet) against the stars in the background. The horizontal size of the map measures 60 arcminutes. Click on the image to access a more detailed full-screen view.

C/1910 A1 (Great January Comet)
RA: 20h 03m 40s
Dec: +06° 50’ 30”
Simplified high-resolution deep sky chart showing the current position of comet C/1910 A1 (Great January Comet). Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

20h 04m 55s
+06° 54’ 54”
14h 18m 26s
10h 23m 21s

J2000

20h 03m 40s
+06° 50’ 30”

Additional Information

Aquila
n/a
n/a
n/a
n/a
-

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.

Rise and Set Times

The following table lists today's rise, transit and set times of comet C/1910 A1 (Great January Comet) from Kipséli, Grecia (all times relative to the local timezone Europe/Athens):

Azimuth: 83.1°
Max altitude: 58.9°
Azimuth: 276.9°

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.

Distance from Earth

The distance of comet C/1910 A1 (Great January Comet) from Earth is currently 19,190,632,829.0 kilometers, equivalent to 128.2814570769 Astronomical Units. Light takes 17h 46m 53.061s to travel from comet C/1910 A1 (Great January Comet) and arrive to us.

19,190,632,829.0
128.2814570769
17h 46m 53.061s

The following graph shows the distance of comet C/1910 A1 (Great January Comet) from Earth as a function of time. In the chart the distance is measured in Astronomical Units and the data is sampled with an interval of 1 day.

Chart of the distance of comet C/1910 A1 (Great January Comet) from Earth in Astronomical Units (au)
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).

The value of the distance of C/1910 A1 (Great January Comet) from Earth is also available as a real time updated value in the live position tracker.

Closest Approach to Earth

In the period between January 1, 2013 and December 30, 2100, the closest approach of comet C/1910 A1 (Great January Comet) to Earth happened on Friday 19 July 2013 at a distance of 119.401412 Astronomical Units, or 17,862,196,965 kilometers:

Friday 19 July 2013
17,862,196,965
119.401412

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

Light Curve

Orbital Elements

The following table lists the orbital elements of comet C/1910 A1 (Great January Comet) at epoch UTC (JD: 2418705.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99978767
Orbit inclination i 138.77827340°
Perihelion distance q 0.12895737 AU
19,291,748 km
Aphelion distance Q 1,214.57634379 AU
181,698,035,198 km
Semi-major axis a 607.35265058 AU
90,858,663,473 km
Orbital period period 14,968.2007 years
5,467,135.3216 days
Date of perihelion transit Tp January 17, 1910
2,418,689.0874 JD
Next perihelion transit July 20, 16878
7,885,824.4090 JD
Argument of perihelion peri 320.89221065435°
Longitude of the ascending node node 90.029584160522°
Mean anomaly M 0.0010807383707759°
Mean motion n 0.00006585°/day

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of comet C/1910 A1 (Great January Comet) relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.

15 Days Ephemeris

The following table lists the ephemerides of comet C/1910 A1 (Great January Comet) computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
Jun 25 2025 20h 05m 07s +06° 54’ 54” N.A. Aquila
Jun 26 2025 20h 05m 05s +06° 54’ 55” N.A. Aquila
Jun 27 2025 20h 05m 04s +06° 54’ 56” N.A. Aquila
Jun 28 2025 20h 05m 02s +06° 54’ 55” N.A. Aquila
Jun 29 2025 20h 05m 01s +06° 54’ 55” N.A. Aquila
Jun 30 2025 20h 04m 59s +06° 54’ 55” N.A. Aquila
Jul 01 2025 20h 04m 57s +06° 54’ 54” N.A. Aquila
Jul 02 2025 20h 04m 55s +06° 54’ 54” N.A. Aquila
Jul 03 2025 20h 04m 54s +06° 54’ 53” N.A. Aquila
Jul 04 2025 20h 04m 52s +06° 54’ 52” N.A. Aquila
Jul 05 2025 20h 04m 50s +06° 54’ 50” N.A. Aquila
Jul 06 2025 20h 04m 49s +06° 54’ 49” N.A. Aquila
Jul 07 2025 20h 04m 47s +06° 54’ 47” N.A. Aquila
Jul 08 2025 20h 04m 45s +06° 54’ 45” N.A. Aquila

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