C/2024 C1 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2024 C1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-08-30T22:56:59.887680Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:18Z |
| Obs used |
188 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-09T09:41:44.390400Z |
| Discovery magnitude (MPC) |
21.20 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-12-14.0000000 |
| e |
0.58255898 |
| q (au) |
4.412801 |
| a (au) |
10.571075 |
| i (deg) |
14.226966 |
| Ω (om, deg) |
83.809025 |
| ω (w, deg) |
94.478490 |
| M (ma, deg) |
3.012281 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.508 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.508 |
| n |
2.000 |
| gf |
0.838 |
| gb |
-0.500 |
| k |
0.862 |
| δ90 |
2.410 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
16:32:05.10 |
-16:11:18.5 |
HIP 81010 |
14.45 |
| 2026-02-03 12:00 |
16:32:23.39 |
-16:12:06.1 |
HIP 81010 |
13.35 |
| 2026-02-04 00:00 |
16:32:41.55 |
-16:12:53.3 |
HIP 81010 |
13.68 |
| 2026-02-04 12:00 |
16:32:59.58 |
-16:13:40.0 |
HIP 81010 |
15.32 |
| 2026-02-05 00:00 |
16:33:17.47 |
-16:14:26.2 |
HIP 81010 |
17.90 |
| 2026-02-05 12:00 |
16:33:35.24 |
-16:15:11.9 |
HIP 81010 |
21.04 |
| 2026-02-06 00:00 |
16:33:52.87 |
-16:15:57.2 |
HIP 81220 |
21.31 |
| 2026-02-06 12:00 |
16:34:10.37 |
-16:16:42.0 |
HIP 81220 |
17.12 |
| 2026-02-07 00:00 |
16:34:27.74 |
-16:17:26.3 |
HIP 81220 |
13.02 |
| 2026-02-07 12:00 |
16:34:44.97 |
-16:18:10.1 |
HIP 81220 |
9.07 |
| 2026-02-08 00:00 |
16:35:02.06 |
-16:18:53.5 |
HIP 81220 |
5.51 |
| 2026-02-08 12:00 |
16:35:19.01 |
-16:19:36.5 |
HIP 81220 |
3.64 |
| 2026-02-09 00:00 |
16:35:35.83 |
-16:20:18.9 |
HIP 81220 |
5.48 |
| 2026-02-09 12:00 |
16:35:52.50 |
-16:21:00.9 |
HIP 81220 |
8.93 |
| 2026-02-10 00:00 |
16:36:09.04 |
-16:21:42.5 |
HIP 81220 |
12.71 |
| 2026-02-10 12:00 |
16:36:25.43 |
-16:22:23.6 |
HIP 81315 |
15.17 |
| 2026-02-11 00:00 |
16:36:41.68 |
-16:23:04.3 |
HIP 81315 |
16.17 |
| 2026-02-11 12:00 |
16:36:57.79 |
-16:23:44.5 |
HIP 81315 |
17.98 |
| 2026-02-12 00:00 |
16:37:13.76 |
-16:24:24.2 |
HIP 81315 |
20.38 |
| 2026-02-12 12:00 |
16:37:29.57 |
-16:25:03.5 |
HIP 81315 |
23.15 |
| 2026-02-13 00:00 |
16:37:45.25 |
-16:25:42.4 |
HIP 81409 |
25.36 |
| 2026-02-13 12:00 |
16:38:00.77 |
-16:26:20.8 |
HIP 81409 |
25.28 |
| 2026-02-14 00:00 |
16:38:16.15 |
-16:26:58.8 |
HIP 81409 |
25.76 |
| 2026-02-14 12:00 |
16:38:31.38 |
-16:27:36.3 |
HIP 81409 |
26.75 |
| 2026-02-15 00:00 |
16:38:46.46 |
-16:28:13.5 |
HIP 81409 |
28.17 |
| 2026-02-15 12:00 |
16:39:01.39 |
-16:28:50.2 |
HIP 81409 |
29.96 |
| 2026-02-16 00:00 |
16:39:16.16 |
-16:29:26.4 |
HIP 81409 |
32.04 |
| 2026-02-16 12:00 |
16:39:30.79 |
-16:30:02.3 |
HIP 81745 |
34.25 |
| 2026-02-17 00:00 |
16:39:45.26 |
-16:30:37.7 |
HIP 81745 |
31.06 |
| 2026-02-17 12:00 |
16:39:59.58 |
-16:31:12.7 |
HIP 81745 |
27.97 |
| 2026-02-18 00:00 |
16:40:13.74 |
-16:31:47.3 |
HIP 81745 |
25.02 |
| 2026-02-18 12:00 |
16:40:27.75 |
-16:32:21.5 |
HIP 81745 |
22.25 |
| 2026-02-19 00:00 |
16:40:41.59 |
-16:32:55.2 |
HIP 81745 |
19.70 |
| 2026-02-19 12:00 |
16:40:55.29 |
-16:33:28.6 |
HIP 81745 |
17.45 |
| 2026-02-20 00:00 |
16:41:08.82 |
-16:34:01.5 |
HIP 81745 |
15.62 |
| 2026-02-20 12:00 |
16:41:22.20 |
-16:34:34.1 |
HIP 81745 |
14.33 |
| 2026-02-21 00:00 |
16:41:35.41 |
-16:35:06.3 |
HIP 81745 |
13.71 |
| 2026-02-21 12:00 |
16:41:48.47 |
-16:35:38.0 |
HIP 81745 |
13.82 |
| 2026-02-22 00:00 |
16:42:01.36 |
-16:36:09.4 |
HIP 81745 |
14.62 |
| 2026-02-22 12:00 |
16:42:14.09 |
-16:36:40.4 |
HIP 81745 |
15.99 |
| 2026-02-23 00:00 |
16:42:26.66 |
-16:37:11.0 |
HIP 81745 |
17.77 |
| 2026-02-23 12:00 |
16:42:39.07 |
-16:37:41.2 |
HIP 81745 |
19.83 |
| 2026-02-24 00:00 |
16:42:51.31 |
-16:38:11.1 |
HIP 81745 |
22.09 |