C/2022 H1 (PANSTARRS)

Metadata

Parameter Value
Designation C/2022 H1 (PANSTARRS)
Type C
Perihelion (tp_cal, UTC) 2024-01-19T11:06:56.177280Z
Orbit solution date (soln_date, UTC) 2025-06-26T10:12:45Z
Obs used 74
NEO -
M1 10.200
K1 5.750
PC -
Discovery observation (MPC, UTC) 2022-04-21T08:36:18.201600Z
Discovery magnitude (MPC) 20.66 w
Discovery observatory (MPC) F52 · Pan-STARRS 2, Haleakala
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2022-09-07.0000000
e 0.99347679
q (au) 7.689370
a (au) 1178.770272
i (deg) 49.866897
Ω (om, deg) 6.365450
ω (w, deg) 246.327042
M (ma, deg) 359.987836

Magnitude

C/2022 H1 (PANSTARRS) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (6.285 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 6.285
n 6.000
gf 1.000
gb -0.833
k 0.800
δ90 9.425
Parameter Symbol Range Description
Absolute magnitude at 1 AU from Sun and Earth H0 -5 to 20 Intrinsic brightness of the comet
Photometric slope parameter n 2 to 6 Rate of brightness change with heliocentric distance
Forward scattering asymmetry factor gf 0.8 to 1 Degree of forward scattering
Backward scattering asymmetry factor gb -1 to -0.5 Degree of backward scattering
Partitioning coefficient k 0.8 to 1 Ratio between forward/backward scattering contributions
Dust-to-gas brightness ratio δ90 1 to 10 Relative contribution of dust scattering to gas emission

Reference: EPSC-DPS2025-160

Finding Chart

C/2022 H1 (PANSTARRS) · Next 30 Days

Ephemeris

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-03-26 00:00 22:35:51.86 -55:17:21.8 HIP 111501 7.31
2026-03-26 12:00 22:36:14.50 -55:16:35.0 HIP 111501 8.86
2026-03-27 00:00 22:36:37.06 -55:15:49.0 HIP 111501 11.20
2026-03-27 12:00 22:36:59.54 -55:15:04.0 HIP 111501 13.93
2026-03-28 00:00 22:37:21.93 -55:14:19.9 HIP 111736 15.12
2026-03-28 12:00 22:37:44.23 -55:13:36.7 HIP 111736 14.92
2026-03-29 00:00 22:38:06.45 -55:12:54.5 HIP 111851 11.73
2026-03-29 12:00 22:38:28.58 -55:12:13.2 HIP 111851 8.53
2026-03-30 00:00 22:38:50.62 -55:11:32.9 HIP 111851 5.37
2026-03-30 12:00 22:39:12.58 -55:10:53.5 HIP 111851 2.38
2026-03-31 00:00 22:39:34.44 -55:10:15.0 HIP 111851 1.75
2026-03-31 12:00 22:39:56.22 -55:09:37.4 HIP 111851 4.54
2026-04-01 00:00 22:40:17.91 -55:09:00.8 HIP 111851 7.63
2026-04-01 12:00 22:40:39.51 -55:08:25.2 HIP 111851 10.74
2026-04-02 00:00 22:41:01.02 -55:07:50.4 HIP 111851 13.86
2026-04-02 12:00 22:41:22.44 -55:07:16.6 HIP 111851 16.96
2026-04-03 00:00 22:41:43.77 -55:06:43.8 HIP 111851 20.06
2026-04-03 12:00 22:42:05.00 -55:06:11.9 HIP 111851 23.14
2026-04-04 00:00 22:42:26.14 -55:05:40.9 HIP 111851 26.20
2026-04-04 12:00 22:42:47.20 -55:05:10.9 HIP 112408 28.31
2026-04-05 00:00 22:43:08.15 -55:04:41.8 HIP 112408 25.29
2026-04-05 12:00 22:43:29.02 -55:04:13.7 HIP 112408 22.30
2026-04-06 00:00 22:43:49.78 -55:03:46.5 HIP 112408 19.32
2026-04-06 12:00 22:44:10.46 -55:03:20.3 HIP 112408 16.37
2026-04-07 00:00 22:44:31.03 -55:02:55.0 HIP 112408 13.45
2026-04-07 12:00 22:44:51.52 -55:02:30.7 HIP 112408 10.57
2026-04-08 00:00 22:45:11.90 -55:02:07.3 HIP 112408 7.75
2026-04-08 12:00 22:45:32.19 -55:01:44.9 HIP 112408 5.10
2026-04-09 00:00 22:45:52.37 -55:01:23.5 HIP 112408 3.00
2026-04-09 12:00 22:46:12.46 -55:01:02.9 HIP 112408 2.98
2026-04-10 00:00 22:46:32.45 -55:00:43.4 HIP 112408 5.03
2026-04-10 12:00 22:46:52.34 -55:00:24.8 HIP 112408 7.62
2026-04-11 00:00 22:47:12.13 -55:00:07.1 HIP 112408 10.34
2026-04-11 12:00 22:47:31.82 -54:59:50.5 HIP 112408 13.10
2026-04-12 00:00 22:47:51.40 -54:59:34.7 HIP 112408 15.86
2026-04-12 12:00 22:48:10.89 -54:59:20.0 HIP 112408 18.62
2026-04-13 00:00 22:48:30.26 -54:59:06.2 HIP 112750 19.78
2026-04-13 12:00 22:48:49.54 -54:58:53.3 HIP 112750 18.28
2026-04-14 00:00 22:49:08.71 -54:58:41.4 HIP 112750 17.08
2026-04-14 12:00 22:49:27.77 -54:58:30.5 HIP 112750 16.25
2026-04-15 00:00 22:49:46.73 -54:58:20.5 HIP 112750 15.83
2026-04-15 12:00 22:50:05.57 -54:58:11.5 HIP 112798 15.51
2026-04-16 00:00 22:50:24.32 -54:58:03.5 HIP 112798 15.16