C/2024 C3 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2024 C3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-11-07T22:23:00.450240Z |
| Orbit solution date (soln_date, UTC) |
2025-04-24T09:42:19Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-09T11:11:24.518400Z |
| Discovery magnitude (MPC) |
21.70 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-03-24.0000000 |
| e |
0.42338622 |
| q (au) |
6.712614 |
| a (au) |
11.641438 |
| i (deg) |
22.466321 |
| Ω (om, deg) |
359.708122 |
| ω (w, deg) |
159.642989 |
| M (ma, deg) |
3.401169 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.380 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.380 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.933 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-02-03 00:00 |
13:58:09.37 |
-24:22:23.4 |
HIP 68143 |
14.76 |
| 2026-02-03 12:00 |
13:58:11.29 |
-24:23:58.0 |
HIP 68143 |
15.01 |
| 2026-02-04 00:00 |
13:58:13.07 |
-24:25:31.8 |
HIP 68143 |
15.41 |
| 2026-02-04 12:00 |
13:58:14.71 |
-24:27:05.1 |
HIP 68143 |
15.92 |
| 2026-02-05 00:00 |
13:58:16.21 |
-24:28:37.8 |
HIP 68143 |
16.55 |
| 2026-02-05 12:00 |
13:58:17.57 |
-24:30:09.8 |
HIP 68143 |
17.26 |
| 2026-02-06 00:00 |
13:58:18.80 |
-24:31:41.1 |
HIP 68143 |
18.04 |
| 2026-02-06 12:00 |
13:58:19.88 |
-24:33:11.9 |
HIP 68143 |
18.89 |
| 2026-02-07 00:00 |
13:58:20.83 |
-24:34:42.0 |
HIP 68143 |
19.78 |
| 2026-02-07 12:00 |
13:58:21.64 |
-24:36:11.4 |
HIP 68143 |
20.72 |
| 2026-02-08 00:00 |
13:58:22.30 |
-24:37:40.2 |
HIP 68269 |
20.76 |
| 2026-02-08 12:00 |
13:58:22.83 |
-24:39:08.3 |
HIP 68269 |
19.29 |
| 2026-02-09 00:00 |
13:58:23.22 |
-24:40:35.8 |
HIP 68269 |
17.83 |
| 2026-02-09 12:00 |
13:58:23.46 |
-24:42:02.6 |
HIP 68269 |
16.38 |
| 2026-02-10 00:00 |
13:58:23.57 |
-24:43:28.7 |
HIP 68269 |
14.95 |
| 2026-02-10 12:00 |
13:58:23.53 |
-24:44:54.2 |
HIP 68269 |
13.54 |
| 2026-02-11 00:00 |
13:58:23.36 |
-24:46:18.9 |
HIP 68269 |
12.15 |
| 2026-02-11 12:00 |
13:58:23.04 |
-24:47:43.0 |
HIP 68269 |
10.77 |
| 2026-02-12 00:00 |
13:58:22.59 |
-24:49:06.4 |
HIP 68269 |
9.43 |
| 2026-02-12 12:00 |
13:58:21.99 |
-24:50:29.1 |
HIP 68269 |
8.12 |
| 2026-02-13 00:00 |
13:58:21.25 |
-24:51:51.0 |
HIP 68269 |
6.86 |
| 2026-02-13 12:00 |
13:58:20.38 |
-24:53:12.3 |
HIP 68269 |
5.68 |
| 2026-02-14 00:00 |
13:58:19.36 |
-24:54:32.9 |
HIP 68269 |
4.64 |
| 2026-02-14 12:00 |
13:58:18.20 |
-24:55:52.7 |
HIP 68269 |
3.83 |
| 2026-02-15 00:00 |
13:58:16.90 |
-24:57:11.9 |
HIP 68269 |
3.43 |
| 2026-02-15 12:00 |
13:58:15.46 |
-24:58:30.3 |
HIP 68269 |
3.57 |
| 2026-02-16 00:00 |
13:58:13.88 |
-24:59:47.9 |
HIP 68269 |
4.19 |
| 2026-02-16 12:00 |
13:58:12.15 |
-25:01:04.9 |
HIP 68269 |
5.11 |
| 2026-02-17 00:00 |
13:58:10.29 |
-25:02:21.1 |
HIP 68269 |
6.21 |
| 2026-02-17 12:00 |
13:58:08.29 |
-25:03:36.6 |
HIP 68269 |
7.40 |
| 2026-02-18 00:00 |
13:58:06.15 |
-25:04:51.3 |
HIP 68269 |
8.64 |
| 2026-02-18 12:00 |
13:58:03.87 |
-25:06:05.2 |
HIP 68269 |
9.92 |
| 2026-02-19 00:00 |
13:58:01.45 |
-25:07:18.5 |
HIP 68269 |
11.22 |
| 2026-02-19 12:00 |
13:57:58.89 |
-25:08:30.9 |
HIP 68269 |
12.54 |
| 2026-02-20 00:00 |
13:57:56.20 |
-25:09:42.6 |
HIP 68269 |
13.87 |
| 2026-02-20 12:00 |
13:57:53.36 |
-25:10:53.5 |
HIP 68269 |
15.20 |
| 2026-02-21 00:00 |
13:57:50.39 |
-25:12:03.7 |
HIP 68269 |
16.55 |
| 2026-02-21 12:00 |
13:57:47.28 |
-25:13:13.1 |
HIP 68269 |
17.90 |
| 2026-02-22 00:00 |
13:57:44.04 |
-25:14:21.7 |
HIP 68269 |
19.26 |
| 2026-02-22 12:00 |
13:57:40.65 |
-25:15:29.6 |
HIP 68269 |
20.62 |
| 2026-02-23 00:00 |
13:57:37.13 |
-25:16:36.6 |
HIP 68269 |
22.00 |
| 2026-02-23 12:00 |
13:57:33.48 |
-25:17:42.9 |
HIP 68269 |
23.37 |
| 2026-02-24 00:00 |
13:57:29.69 |
-25:18:48.4 |
HIP 68269 |
24.76 |