| Parameter |
Value |
| Designation |
C/2024 F2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-07-29T05:46:49.535040Z |
| Orbit solution date (soln_date, UTC) |
2026-04-03T09:12:19Z |
| Obs used |
223 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
15.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-03-21T14:31:59.174400Z |
| Discovery magnitude (MPC) |
21.01 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-08-21.0000000 |
| e |
0.60120060 |
| q (au) |
3.968209 |
| a (au) |
9.950389 |
| i (deg) |
13.740805 |
| Ω (om, deg) |
138.947892 |
| ω (w, deg) |
112.924995 |
| M (ma, deg) |
0.714661 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.553 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.553 |
| n |
6.000 |
| gf |
0.900 |
| gb |
-0.833 |
| k |
0.999 |
| δ90 |
4.835 |
| 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) |
| 2026-07-29 00:00 |
23:00:00.08 |
-11:34:42.7 |
HIP 113552 |
11.93 |
| 2026-07-29 12:00 |
22:59:52.30 |
-11:36:21.3 |
HIP 113552 |
13.47 |
| 2026-07-30 00:00 |
22:59:44.40 |
-11:38:00.5 |
HIP 113552 |
15.28 |
| 2026-07-30 12:00 |
22:59:36.39 |
-11:39:40.2 |
HIP 113552 |
17.29 |
| 2026-07-31 00:00 |
22:59:28.26 |
-11:41:20.4 |
HIP 113552 |
19.46 |
| 2026-07-31 12:00 |
22:59:20.01 |
-11:43:01.2 |
HIP 113552 |
21.74 |
| 2026-08-01 00:00 |
22:59:11.66 |
-11:44:42.4 |
HIP 113552 |
24.10 |
| 2026-08-01 12:00 |
22:59:03.19 |
-11:46:24.1 |
HIP 113552 |
26.55 |
| 2026-08-02 00:00 |
22:58:54.61 |
-11:48:06.3 |
HIP 113552 |
29.05 |
| 2026-08-02 12:00 |
22:58:45.91 |
-11:49:49.0 |
HIP 113552 |
31.61 |
| 2026-08-03 00:00 |
22:58:37.12 |
-11:51:32.1 |
HIP 113552 |
34.21 |
| 2026-08-03 12:00 |
22:58:28.21 |
-11:53:15.6 |
HIP 113552 |
36.86 |
| 2026-08-04 00:00 |
22:58:19.20 |
-11:54:59.6 |
HIP 113552 |
39.54 |
| 2026-08-04 12:00 |
22:58:10.08 |
-11:56:44.0 |
HIP 113264 |
40.23 |
| 2026-08-05 00:00 |
22:58:00.86 |
-11:58:28.8 |
HIP 113264 |
37.39 |
| 2026-08-05 12:00 |
22:57:51.54 |
-12:00:13.9 |
HIP 113264 |
34.54 |
| 2026-08-06 00:00 |
22:57:42.12 |
-12:01:59.5 |
HIP 113264 |
31.66 |
| 2026-08-06 12:00 |
22:57:32.60 |
-12:03:45.4 |
HIP 113264 |
28.76 |
| 2026-08-07 00:00 |
22:57:22.98 |
-12:05:31.7 |
HIP 113264 |
25.85 |
| 2026-08-07 12:00 |
22:57:13.27 |
-12:07:18.3 |
HIP 113264 |
22.93 |
| 2026-08-08 00:00 |
22:57:03.46 |
-12:09:05.2 |
HIP 113264 |
20.00 |
| 2026-08-08 12:00 |
22:56:53.56 |
-12:10:52.5 |
HIP 113264 |
17.07 |
| 2026-08-09 00:00 |
22:56:43.57 |
-12:12:40.0 |
HIP 113264 |
14.16 |
| 2026-08-09 12:00 |
22:56:33.48 |
-12:14:27.8 |
HIP 113264 |
11.30 |
| 2026-08-10 00:00 |
22:56:23.31 |
-12:16:15.9 |
HIP 113264 |
8.56 |
| 2026-08-10 12:00 |
22:56:13.06 |
-12:18:04.3 |
HIP 113264 |
6.13 |
| 2026-08-11 00:00 |
22:56:02.71 |
-12:19:52.9 |
HIP 113264 |
4.57 |
| 2026-08-11 12:00 |
22:55:52.29 |
-12:21:41.7 |
HIP 113264 |
4.87 |
| 2026-08-12 00:00 |
22:55:41.79 |
-12:23:30.7 |
HIP 113264 |
6.80 |
| 2026-08-12 12:00 |
22:55:31.20 |
-12:25:19.9 |
HIP 113264 |
9.44 |
| 2026-08-13 00:00 |
22:55:20.54 |
-12:27:09.3 |
HIP 113264 |
12.34 |
| 2026-08-13 12:00 |
22:55:09.80 |
-12:28:58.9 |
HIP 113264 |
15.37 |
| 2026-08-14 00:00 |
22:54:58.99 |
-12:30:48.6 |
HIP 113264 |
18.47 |
| 2026-08-14 12:00 |
22:54:48.11 |
-12:32:38.4 |
HIP 113264 |
21.62 |
| 2026-08-15 00:00 |
22:54:37.16 |
-12:34:28.4 |
HIP 113085 |
24.19 |
| 2026-08-15 12:00 |
22:54:26.14 |
-12:36:18.4 |
HIP 113085 |
25.32 |
| 2026-08-16 00:00 |
22:54:15.06 |
-12:38:08.5 |
HIP 113085 |
26.79 |
| 2026-08-16 12:00 |
22:54:03.91 |
-12:39:58.8 |
HIP 113085 |
28.57 |
| 2026-08-17 00:00 |
22:53:52.70 |
-12:41:49.0 |
HIP 112980 |
28.69 |
| 2026-08-17 12:00 |
22:53:41.43 |
-12:43:39.3 |
HIP 112980 |
25.69 |
| 2026-08-18 00:00 |
22:53:30.10 |
-12:45:29.6 |
HIP 112980 |
22.78 |
| 2026-08-18 12:00 |
22:53:18.72 |
-12:47:20.0 |
HIP 112980 |
19.98 |
| 2026-08-19 00:00 |
22:53:07.28 |
-12:49:10.3 |
HIP 112980 |
17.37 |