P/2020 S1 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	24 Sep 2020	20.5	3.068 AU	2.092 AU	00h06m	-15°48'	163.7°	5.3°	359°
Perihelion	17 Jan 2021	21.2	2.957 AU	3.163 AU	00h40m	-09°06'	69.0°	18.1°	71°
Today	22 Dec 2024	27.1	7.573 AU	7.421 AU	11h57m	+09°51'	95.1°	7.4°	293°

The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of P/2020 S1 (PANSTARRS) are:

            e (Eccentricity)                : 0.5071980
            q (Perihelion distance)         : 2.9570480
            i (Inclination)                 : 13.71720
            Ω (Longitude of ascending node) : 129.50000
            ω (Argument of perihelion)      : 255.12900
            L (Longitude of perihelion)     : 204.21255
            B (Latitude of perihelion)      : -13.24923
            T (Time of perihelion passage)  : 2459231.88470
            P (Orbital period in years)     : 14.70

            Epoch                           : 2024 Dec 21
            Reference                       : MPEC 2021-BE3

            Classification(s):              : Ecliptic; Jupiter family
            Tisserand (Jupiter)             : 2.665
        

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (14.00 + 5 log[∆] + 10.00 log[r]).

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly version of the same chart can be found further down this page as well.

The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2024-12-22 00:00 UT   11 57 47.8   +09 51 06     7.428    7.572   94.7    7.4   293   27.1 
2024-12-22 10:51 UT   11 57 51.2   +09 51 32     7.421    7.573   95.1    7.4   293   27.1 
2024-12-23 00:00 UT   11 57 55.1   +09 52 04     7.414    7.574   95.7    7.4   293   27.1 
2024-12-24 00:00 UT   11 58 02.0   +09 53 05     7.399    7.577   96.6    7.4   293   27.1 
2024-12-25 00:00 UT   11 58 08.3   +09 54 09     7.385    7.579   97.6    7.4   293   27.1 
2024-12-26 00:00 UT   11 58 14.1   +09 55 17     7.371    7.581   98.6    7.4   292   27.1 
2024-12-27 00:00 UT   11 58 19.4   +09 56 29     7.357    7.584   99.6    7.3   292   27.1 
2024-12-28 00:00 UT   11 58 24.2   +09 57 44     7.343    7.586  100.6    7.3   292   27.1 
2024-12-29 00:00 UT   11 58 28.5   +09 59 02     7.329    7.589  101.6    7.3   292   27.1 
2024-12-30 00:00 UT   11 58 32.2   +10 00 24     7.315    7.591  102.6    7.3   292   27.1 
2024-12-31 00:00 UT   11 58 35.5   +10 01 49     7.301    7.593  103.6    7.2   292   27.1 
2025-01-01 00:00 UT   11 58 38.2   +10 03 18     7.288    7.596  104.6    7.2   291   27.1 

    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km      
    

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.