P/2024 OC2 (PANSTARRS)

Metadata

Parameter Value
Designation P/2024 OC2 (PANSTARRS)
Type P
Perihelion (tp_cal, UTC) 2024-10-09T07:52:40.143360Z
Orbit solution date (soln_date, UTC) 2025-01-14T17:42:19Z
Obs used 43
NEO Yes
M1 20.700
K1 14.750
PC -
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2024-08-20.0000000
e 0.77423172
q (au) 0.592825
a (au) 2.625811
i (deg) 7.671223
Ω (om, deg) 136.619189
ω (w, deg) 258.539659
M (ma, deg) 348.342092

Magnitude

P/2024 OC2 (PANSTARRS) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 -
n -
gf -
gb -
k -
δ90 -
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

Ephemeris

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-09-20 00:00 13:44:54.84 -04:07:47.5 HIP 66966 22.78
2026-09-20 12:00 13:45:16.81 -04:10:07.7 HIP 67092 27.23
2026-09-21 00:00 13:45:38.83 -04:12:27.9 HIP 67092 26.10
2026-09-21 12:00 13:46:00.90 -04:14:48.1 HIP 67092 26.33
2026-09-22 00:00 13:46:23.03 -04:17:08.2 HIP 67092 27.87
2026-09-22 12:00 13:46:45.22 -04:19:28.3 HIP 67092 30.55
2026-09-23 00:00 13:47:07.46 -04:21:48.3 HIP 67366 28.55
2026-09-23 12:00 13:47:29.75 -04:24:08.3 HIP 67366 23.17
2026-09-24 00:00 13:47:52.09 -04:26:28.2 HIP 67366 18.19
2026-09-24 12:00 13:48:14.49 -04:28:48.1 HIP 67366 14.06
2026-09-25 00:00 13:48:36.94 -04:31:07.9 HIP 67366 11.75
2026-09-25 12:00 13:48:59.44 -04:33:27.6 HIP 67366 12.32
2026-09-26 00:00 13:49:21.99 -04:35:47.3 HIP 67366 15.49
2026-09-26 12:00 13:49:44.59 -04:38:06.9 HIP 67366 20.06
2026-09-27 00:00 13:50:07.24 -04:40:26.4 HIP 67366 25.29
2026-09-27 12:00 13:50:29.93 -04:42:45.8 HIP 67366 30.85
2026-09-28 00:00 13:50:52.68 -04:45:05.2 HIP 67741 31.91
2026-09-28 12:00 13:51:15.47 -04:47:24.4 HIP 67741 26.02
2026-09-29 00:00 13:51:38.31 -04:49:43.6 HIP 67741 20.27
2026-09-29 12:00 13:52:01.20 -04:52:02.6 HIP 67741 14.84
2026-09-30 00:00 13:52:24.13 -04:54:21.6 HIP 67741 10.24
2026-09-30 12:00 13:52:47.11 -04:56:40.4 HIP 67741 8.11
2026-10-01 00:00 13:53:10.13 -04:58:59.2 HIP 67741 10.16
2026-10-01 12:00 13:53:33.19 -05:01:17.8 HIP 67741 14.74
2026-10-02 00:00 13:53:56.30 -05:03:36.3 HIP 67741 20.21
2026-10-02 12:00 13:54:19.46 -05:05:54.7 HIP 67741 26.02
2026-10-03 00:00 13:54:42.66 -05:08:12.9 HIP 67741 31.99
2026-10-03 12:00 13:55:05.89 -05:10:31.0 HIP 67741 38.05
2026-10-04 00:00 13:55:29.17 -05:12:49.0 HIP 68192 36.21
2026-10-04 12:00 13:55:52.50 -05:15:06.8 HIP 68192 29.99
2026-10-05 00:00 13:56:15.86 -05:17:24.5 HIP 68192 23.78
2026-10-05 12:00 13:56:39.26 -05:19:42.1 HIP 68192 17.59
2026-10-06 00:00 13:57:02.70 -05:21:59.4 HIP 68192 11.47
2026-10-06 12:00 13:57:26.18 -05:24:16.7 HIP 68192 5.68
2026-10-07 00:00 13:57:49.70 -05:26:33.7 HIP 68192 3.43
2026-10-07 12:00 13:58:13.25 -05:28:50.6 HIP 68192 8.39
2026-10-08 00:00 13:58:36.84 -05:31:07.3 HIP 68348 13.88
2026-10-08 12:00 13:59:00.47 -05:33:23.8 HIP 68348 10.47
2026-10-09 00:00 13:59:24.13 -05:35:40.1 HIP 68348 10.30
2026-10-09 12:00 13:59:47.83 -05:37:56.3 HIP 68348 13.50
2026-10-10 00:00 14:00:11.56 -05:40:12.2 HIP 68348 18.40
2026-10-10 12:00 14:00:35.32 -05:42:27.9 HIP 68524 17.19
2026-10-11 00:00 14:00:59.11 -05:44:43.5 HIP 68524 12.06