322P/SOHO
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Today	25 Nov 2025	29.7	4.906 AU	5.859 AU	15h06m	-25°57'	13.8°	2.8°	251°
Nearest approach	23 Jun 2027	19.2	1.329 AU	0.620 AU	12h30m	-29°59'	106.1°	47.3°	108°
Perihelion	11 Aug 2027	6.1	0.051 AU	1.014 AU	09h12m	+16°38'	2.9°	88.3°	297°

This comet is a sunskirter. Although it may become very bright at perihelion, this will only be for a very short period very close to the sun.

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.)

Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. 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. (19.0 + 5 log[∆] + 10.0 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)

Charts

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.

Orbital elements

The orbital elements of 322P/SOHO are:

    e (Eccentricity)                : 0.9798600
    q (Perihelion distance)         : 0.0505250
    i (Inclination)                 : 11.43880
    Ω (Longitude of ascending node) : 351.41280
    ω (Argument of perihelion)      : 56.99760
    L (Longitude of perihelion)     : 47.88320
    B (Latitude of perihelion)      : 9.57402
    T (Time of perihelion passage)  : 2461629.05520
    P (Orbital period in years)     : 3.97

    Epoch                           : 2025 Nov 24
    Reference                       : MPEC 2025-W75

    Classification(s):              : Ecliptic; Jupiter family; Sunskirter
    Tisserand (Jupiter)             : 2.346

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-11-24 00:00 UT   15 05 56.1   -25 53 36     5.864    4.908   13.1    2.6   248   29.7 
2025-11-25 00:00 UT   15 06 41.4   -25 56 52     5.860    4.907   13.8    2.7   250   29.7 
2025-11-25 02:38 UT   15 06 46.4   -25 57 14     5.859    4.906   13.8    2.8   251   29.7 
2025-11-26 00:00 UT   15 07 26.6   -26 00 08     5.855    4.905   14.5    2.9   252   29.7 
2025-11-27 00:00 UT   15 08 11.8   -26 03 25     5.850    4.904   15.2    3.0   254   29.7 
2025-11-28 00:00 UT   15 08 56.9   -26 06 42     5.845    4.903   15.9    3.2   256   29.7 
2025-11-29 00:00 UT   15 09 41.8   -26 09 59     5.839    4.902   16.6    3.3   257   29.7 
2025-11-30 00:00 UT   15 10 26.7   -26 13 17     5.833    4.900   17.3    3.4   258   29.7 
2025-12-01 00:00 UT   15 11 11.5   -26 16 34     5.827    4.899   18.1    3.6   260   29.7 
2025-12-02 00:00 UT   15 11 56.2   -26 19 52     5.821    4.898   18.8    3.7   261   29.7 
2025-12-03 00:00 UT   15 12 40.8   -26 23 09     5.814    4.897   19.6    3.9   262   29.7 
2025-12-04 00:00 UT   15 13 25.2   -26 26 27     5.808    4.895   20.3    4.0   263   29.7 
2025-12-05 00:00 UT   15 14 09.6   -26 29 45     5.801    4.894   21.1    4.2   264   29.7 

    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.