The below table lists all comets that are expected to become brighter than magnitude 15 in the coming 3 months.
For detailed information about a comet, click on its designation.

Comet(s)	Today			Perihelion			Nearest approach
designation	magn	delta	radius	date	magn	radius	date	magn	delta
C/2025 R3 (PANSTARRS)	10.5	1.93 AU	1.31 AU	19 Apr 2026	3.8	0.50 AU	26 Apr 2026	1.3	0.49 AU
220P/McNaught	10.9	1.50 AU	1.56 AU	14 Jun 2026	10.9	1.56 AU	12 Oct 2026	11.0	1.02 AU
88P/Howell	11.9	1.92 AU	1.66 AU	18 Mar 2026	10.3	1.36 AU	10 Oct 2026	14.5	1.50 AU
10P/Tempel	12.4	0.60 AU	1.50 AU	2 Aug 2026	10.9	1.42 AU	3 Aug 2026	10.9	0.41 AU
29P/Schwassmann-Wachmann	12.6	6.36 AU	6.32 AU	21 Apr 2019	12.4	5.80 AU	9 Sep 2018	11.7	4.81 AU
C/2023 R1 (PANSTARRS)	14.0	2.63 AU	3.62 AU	13 Apr 2026	14.5	3.57 AU	12 Jun 2026	14.0	2.63 AU
C/2024 T5 (ATLAS)	14.1	5.45 AU	4.75 AU	6 May 2027	12.5	3.84 AU	24 Dec 2026	12.0	3.17 AU
C/2025 A6 (Lemmon)	14.2	3.31 AU	3.54 AU	8 Nov 2025	4.7	0.53 AU	21 Oct 2025	4.3	0.60 AU
C/2024 J3 (ATLAS)	14.2	3.61 AU	4.12 AU	25 Nov 2026	14.2	3.87 AU	25 Jul 2026	14.0	3.45 AU
C/2014 UN271 (Bernardinelli-Bernstein)	14.6	13.83 AU	13.89 AU	16 Jan 2031	12.4	10.96 AU	5 Apr 2031	12.2	10.12 AU
78P/Gehrels	14.8	2.82 AU	2.01 AU	25 Jun 2026	14.7	2.00 AU	31 Dec 2026	15.1	1.56 AU
63P/Wild	15.1	2.47 AU	1.98 AU	6 Jul 2026	15.1	1.97 AU	23 Jan 2026	18.6	1.69 AU
235P/LINEAR	15.2	1.41 AU	2.39 AU	22 Dec 2025	14.5	1.98 AU	19 May 2026	14.6	1.32 AU
161P/Hartley-IRAS	16.5	2.79 AU	2.44 AU	27 Nov 2026	10.8	1.27 AU	2 Oct 2026	9.6	0.51 AU
169P/NEAT	17.6	0.74 AU	1.65 AU	21 Sep 2026	15.1	0.60 AU	11 Aug 2026	13.2	0.17 AU

For each of the listed comets, the current position is plotted in the below all-sky chart:

    Terminology:
            
    delta:      Distance between comet and earth in AU
    radius:     Distance between comet and sun in AU
    magn:       Magnitude (brightness) estimate    
    elong:      Elongation in degrees (angle sun-earth-comet)    
    AU:         Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    Perihelion: On this date the comet (or other type of body) is closest to the sun
    

Orbital elements provided by MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database).
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.