473P/NEAT
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	4 Nov 2023	16.0	2.008 AU	1.414 AU	23h38m	-38°47'	111.9°	27.3°	47°
Perihelion	26 Feb 2024	12.8	1.407 AU	1.911 AU	00h17m	+29°04'	45.5°	30.1°	37°
Today	5 Feb 2026	32.0	6.505 AU	6.173 AU	13h54m	-11°58'	105.4°	8.4°	291°

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. This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 7.7 + 5 log[∆] + 25.1 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 473P/NEAT are:

    e (Eccentricity)                : 0.8235510
    q (Perihelion distance)         : 1.4069760
    i (Inclination)                 : 56.87990
    Ω (Longitude of ascending node) : 22.19150
    ω (Argument of perihelion)      : 42.94990
    L (Longitude of perihelion)     : 49.15075
    B (Latitude of perihelion)      : 34.79600
    T (Time of perihelion passage)  : 2460366.69470
    P (Orbital period in years)     : 22.52

    Epoch                           : 2026 Feb 04
    Reference                       : MPEC 2025-W75

    Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-02-04 00:00 UT   13 54 21.0   -11 56 21     6.187    6.497  104.0    8.5   290   32.0 
2026-02-05 00:00 UT   13 54 12.1   -11 57 41     6.177    6.503  105.1    8.4   291   32.0 
2026-02-05 08:21 UT   13 54 08.8   -11 58 08     6.173    6.505  105.4    8.4   291   32.0 
2026-02-06 00:00 UT   13 54 02.6   -11 58 58     6.166    6.509  106.1    8.4   291   32.0 
2026-02-07 00:00 UT   13 53 52.4   -12 00 12     6.155    6.515  107.1    8.3   291   32.0 
2026-02-08 00:00 UT   13 53 41.5   -12 01 23     6.145    6.521  108.2    8.3   291   32.0 
2026-02-09 00:00 UT   13 53 30.1   -12 02 30     6.135    6.527  109.2    8.2   291   32.0 
2026-02-10 00:00 UT   13 53 17.9   -12 03 35     6.125    6.533  110.3    8.1   291   32.0 
2026-02-11 00:00 UT   13 53 05.1   -12 04 36     6.114    6.539  111.4    8.1   291   32.0 
2026-02-12 00:00 UT   13 52 51.6   -12 05 33     6.104    6.545  112.4    8.0   291   32.0 
2026-02-13 00:00 UT   13 52 37.5   -12 06 28     6.095    6.551  113.5    7.9   291   32.1 
2026-02-14 00:00 UT   13 52 22.8   -12 07 20     6.085    6.557  114.5    7.9   291   32.1 
2026-02-15 00:00 UT   13 52 07.4   -12 08 08     6.075    6.563  115.6    7.8   291   32.1 

    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.