Comet C/2012 S1 (ISON)
Comet C/2012 S1 (ISON) Sky Charts and Coordinates
This is a simplified sky chart, showing where Comet C/2012 S1 (ISON) is now with respect to the brightest stars and constellations.
More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.
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 behvior 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 C/2012 S1 (ISON) Rise and Set Times
Today's Comet C/2012 S1 (ISON) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.
Comet C/2012 S1 (ISON) Orbit Diagram
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2012 S1 (ISON) with respect of the Sun and the orbits of the major planets. The position of Comet C/2012 S1 (ISON) 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/2012 S1 (ISON) Ephemeris
The following table lists the ephemerides of Comet C/2012 S1 (ISON) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2012 S1 (ISON) in our Online Planetarium at the chosen date.
|2018 Sep 19||07h 40m 05s||+37° 01’ 33”||N.A.||Lynx|
|2018 Sep 20||07h 40m 11s||+37° 02’ 08”||N.A.||Lynx|
|2018 Sep 21||07h 40m 18s||+37° 02’ 44”||N.A.||Lynx|
|2018 Sep 22||07h 40m 26s||+37° 03’ 21”||N.A.||Lynx|
|2018 Sep 23||07h 40m 32s||+37° 04’ 00”||N.A.||Lynx|
|2018 Sep 24||07h 40m 39s||+37° 04’ 39”||N.A.||Lynx|
|2018 Sep 25||07h 40m 45s||+37° 05’ 18”||N.A.||Lynx|
|2018 Sep 26||07h 40m 50s||+37° 06’ 00”||N.A.||Lynx|
|2018 Sep 27||07h 40m 55s||+37° 06’ 42”||N.A.||Lynx|
|2018 Sep 28||07h 41m 00s||+37° 07’ 23”||N.A.||Lynx|
|2018 Sep 29||07h 41m 05s||+37° 08’ 08”||N.A.||Lynx|
|2018 Sep 30||07h 41m 09s||+37° 08’ 52”||N.A.||Lynx|
|2018 Oct 01||07h 41m 14s||+37° 09’ 37”||N.A.||Lynx|
|2018 Oct 02||07h 41m 18s||+37° 10’ 23”||N.A.||Lynx|
Distance of Comet C/2012 S1 (ISON) from Earth
The following chart shows the distance of Comet C/2012 S1 (ISON) from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.
The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2012 S1 (ISON) is also available as a real time updated value in the Live Position and Data Tracker.
Light Curve of Comet C/2012 S1 (ISON)
The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2012 S1 (ISON), 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/2012 S1 (ISON) Orbital Elements
The following table lists the orbital elements of Comet C/2012 S1 (ISON) at epoch 03 December 2013 00:00 UTC (JD: 2456630.5). Source: JPL Small-Body Database
|Perihelion distance||q||0.01245259 AU
|Date of perihelion transit||Tp||2013-Nov-28 18:41:16
|Argument of perihelion||peri||345.53124062058°|
|Longitude of the ascending node||node||295.65203155°|
|Closest approach to Earth*||2013-Dec-27|
|Distance of closest approach*||0.43060397 AU
* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.