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🌎 Location: Greenwich, United Kingdom [change]

Comet Ikeya-Seki (C/1965 S1)

Comet Ikeya-Seki (C/1965 S1) is currently in the constellation of Canis Majoris. The current Right Ascension of Comet Ikeya-Seki (C/1965 S1) is 06h 49m 35s and the Declination is -12° 13’ 00” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]).

Summary of key facts about Comet Ikeya-Seki (C/1965 S1) [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]:

06h 49m 35s
-12° 13’ 00”
Canis Majoris

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Additional information about Comet Ikeya-Seki (C/1965 S1) available on TheSkyLive:

Available Resources

Comet Ikeya-Seki (C/1965 S1) Position and Finder Charts

Below we provide Comet Ikeya-Seki (C/1965 S1) 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 Ikeya-Seki (C/1965 S1) in Canis Majoris on October, 25 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet Ikeya-Seki (C/1965 S1) in Canis Majoris on October, 25 2020
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 Ikeya-Seki (C/1965 S1) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/1965 S1 (Ikeya-Seki)
RA: 06h 49m 35s
Dec: -12° 13’ 00”
Deep sky finder chart for Comet Ikeya-Seki (C/1965 S1)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet Ikeya-Seki (C/1965 S1)?, a page that provides all the information needed to find Comet Ikeya-Seki (C/1965 S1) in the sky and additional links to sky charts.

Comet Ikeya-Seki (C/1965 S1) Distance from Earth

The distance of Comet Ikeya-Seki (C/1965 S1) from Earth is currently 10,926,817,363 kilometers, equivalent to 73.041263 Astronomical Units. Light takes 10 hours, 7 minutes and 27.9395 seconds to travel from Comet Ikeya-Seki (C/1965 S1) and arrive to us.

10 hours, 7 minutes and 27.9395 seconds

The following chart shows the distance of Comet Ikeya-Seki (C/1965 S1) 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 Ikeya-Seki (C/1965 S1) from Earth between January 1900 and January 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/1965 S1 (Ikeya-Seki) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet Ikeya-Seki (C/1965 S1) to Earth

Between January 1900 and January 2100, the closest approach of Comet Ikeya-Seki (C/1965 S1) to Earth happens on Sun Oct 17 1965 at a distance of 0.906593 Astronomical Units, or 135,624,420 kilometers:

Sun Oct 17 1965

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

Comet Ikeya-Seki (C/1965 S1) brightness

The current visual magnitude of Comet Ikeya-Seki (C/1965 S1) is -100.00.


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.

Comet Ikeya-Seki (C/1965 S1) 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 Ikeya-Seki (C/1965 S1) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.2°
Max altitude: 26.3°
Azimuth: 257.8°

The rise and set times are defined as the time at which the upper limb of Comet Ikeya-Seki (C/1965 S1) 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 Ikeya-Seki (C/1965 S1) Orbital Elements

The following table lists the orbital elements of Comet Ikeya-Seki (C/1965 S1) at epoch 01 January 1970 00:00 UTC (JD: 2439040.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99991500
Orbit inclination i 141.86420000°
Perihelion distance q 0.00778600 AU
1,164,769 km
Aphelion distance Q 183.19221400 AU
27,405,165,198 km
Semi-major axis a 91.60000000 AU
13,703,164,984 km
Orbital period period 880.0000 years
321,420.0000 days
Date of perihelion transit Tp 1965-Oct-21 04:24:31
2,439,054.6837 JD
Next perihelion transit 2845-Oct-27 04:24
2,760,474.6837 JD
Argument of perihelion peri 69.0486°
Longitude of the ascending node node 346.9947°
Mean anomaly M -0.015946°
Mean motion n 0.00112420°/day

Visualization of Comet Ikeya-Seki (C/1965 S1) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet Ikeya-Seki (C/1965 S1) with respect of the Sun and the orbits of the major planets. The position of Comet Ikeya-Seki (C/1965 S1) 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 Ikeya-Seki (C/1965 S1)
View Comet Ikeya-Seki (C/1965 S1) in the 3D Solar System Simulator

Comet Ikeya-Seki (C/1965 S1) 15 Days Ephemeris

The following table lists the ephemerides of Comet Ikeya-Seki (C/1965 S1) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet Ikeya-Seki (C/1965 S1) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Oct 18 06h 49m 41s -12° 10’ 00” N.A. Canis Majoris
2020 Oct 19 06h 49m 41s -12° 10’ 26” N.A. Canis Majoris
2020 Oct 20 06h 49m 40s -12° 10’ 51” N.A. Canis Majoris
2020 Oct 21 06h 49m 38s -12° 11’ 17” N.A. Canis Majoris
2020 Oct 22 06h 49m 37s -12° 11’ 44” N.A. Canis Majoris
2020 Oct 23 06h 49m 36s -12° 12’ 09” N.A. Canis Majoris
2020 Oct 24 06h 49m 36s -12° 12’ 34” N.A. Canis Majoris
2020 Oct 25 06h 49m 35s -12° 13’ 00” N.A. Canis Majoris
2020 Oct 26 06h 49m 33s -12° 13’ 24” N.A. Canis Majoris
2020 Oct 27 06h 49m 32s -12° 13’ 49” N.A. Canis Majoris
2020 Oct 28 06h 49m 31s -12° 14’ 13” N.A. Canis Majoris
2020 Oct 29 06h 49m 30s -12° 14’ 38” N.A. Canis Majoris
2020 Oct 30 06h 49m 27s -12° 15’ 02” N.A. Canis Majoris
2020 Oct 31 06h 49m 27s -12° 15’ 24” N.A. Canis Majoris