C/2015 VL62 (Lemmon-Yeung-PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	21 Aug 2017	13.5	2.726 AU	1.745 AU	21h33m	+04°20'	162.2°	6.5°	157°
Perihelion	28 Aug 2017	13.5	2.725 AU	1.766 AU	21h06m	+01°19'	157.2°	8.2°	119°
Today	4 Aug 2025	27.5	20.034 AU	20.578 AU	12h04m	-15°29'	56.4°	2.4°	124°

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 C/2015 VL62 (Lemmon-Yeung-PANSTARRS) are:

            e (Eccentricity)                : 1.0019130
            q (Perihelion distance)         : 2.7251090
            i (Inclination)                 : 165.82460
            Ω (Longitude of ascending node) : 95.21370
            ω (Argument of perihelion)      : 129.02130
            L (Longitude of perihelion)     : 145.32310
            B (Latitude of perihelion)      : 10.96789
            T (Time of perihelion passage)  : 2457993.75870

            Epoch                           : 2022 Sep 14
            Reference                       : MPC115881

            Classification(s):              : Nearly isotropic; New (a > 10000 AU)
        

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 gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (8.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 7.89 + 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
2025-08-04 00:00 UT   12 04 22.1   -15 29 41    20.568   20.032   56.9    2.4   123   27.5 
2025-08-04 12:31 UT   12 04 25.2   -15 29 42    20.578   20.034   56.4    2.4   124   27.5 
2025-08-05 00:00 UT   12 04 28.1   -15 29 44    20.586   20.037   56.0    2.4   124   27.5 
2025-08-06 00:00 UT   12 04 34.2   -15 29 48    20.605   20.042   55.1    2.4   124   27.5 
2025-08-07 00:00 UT   12 04 40.4   -15 29 54    20.623   20.047   54.2    2.4   124   27.5 
2025-08-08 00:00 UT   12 04 46.7   -15 30 01    20.641   20.052   53.3    2.3   125   27.5 
2025-08-09 00:00 UT   12 04 53.2   -15 30 09    20.659   20.057   52.4    2.3   125   27.5 
2025-08-10 00:00 UT   12 04 59.8   -15 30 19    20.677   20.062   51.5    2.3   125   27.5 
2025-08-11 00:00 UT   12 05 06.5   -15 30 30    20.695   20.067   50.6    2.2   126   27.5 
2025-08-12 00:00 UT   12 05 13.3   -15 30 42    20.712   20.072   49.7    2.2   126   27.5 
2025-08-13 00:00 UT   12 05 20.2   -15 30 55    20.729   20.077   48.8    2.2   126   27.5 
2025-08-14 00:00 UT   12 05 27.2   -15 31 10    20.746   20.082   47.9    2.1   127   27.5 

    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.