| Parameter |
Value |
| Designation |
C/2024 Q3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-05T05:25:00.739200Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:13:08Z |
| Obs used |
78 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
7.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-08-27T09:52:56.323200Z |
| Discovery magnitude (MPC) |
21.06 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-10-14.0000000 |
| e |
1.00151399 |
| q (au) |
2.091551 |
| a (au) |
-1381.479710 |
| i (deg) |
121.375983 |
| Ω (om, deg) |
337.283849 |
| ω (w, deg) |
70.127632 |
| M (ma, deg) |
-0.002730 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.376 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.376 |
| n |
6.000 |
| gf |
0.996 |
| gb |
-0.685 |
| k |
0.950 |
| 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) |
| 2026-06-01 00:00 |
10:21:35.94 |
+18:02:51.2 |
HIP 50882 |
32.30 |
| 2026-06-01 12:00 |
10:21:33.21 |
+18:00:20.0 |
HIP 50882 |
31.39 |
| 2026-06-02 00:00 |
10:21:30.68 |
+17:57:48.6 |
HIP 50814 |
30.29 |
| 2026-06-02 12:00 |
10:21:28.34 |
+17:55:16.9 |
HIP 50814 |
28.34 |
| 2026-06-03 00:00 |
10:21:26.19 |
+17:52:45.1 |
HIP 50814 |
26.48 |
| 2026-06-03 12:00 |
10:21:24.23 |
+17:50:13.0 |
HIP 50814 |
24.71 |
| 2026-06-04 00:00 |
10:21:22.46 |
+17:47:40.8 |
HIP 50814 |
23.06 |
| 2026-06-04 12:00 |
10:21:20.87 |
+17:45:08.4 |
HIP 50814 |
21.56 |
| 2026-06-05 00:00 |
10:21:19.47 |
+17:42:35.7 |
HIP 50814 |
20.24 |
| 2026-06-05 12:00 |
10:21:18.25 |
+17:40:02.9 |
HIP 50814 |
19.13 |
| 2026-06-06 00:00 |
10:21:17.20 |
+17:37:29.9 |
HIP 50814 |
18.27 |
| 2026-06-06 12:00 |
10:21:16.34 |
+17:34:56.8 |
HIP 50814 |
17.71 |
| 2026-06-07 00:00 |
10:21:15.66 |
+17:32:23.4 |
HIP 50814 |
17.46 |
| 2026-06-07 12:00 |
10:21:15.15 |
+17:29:49.9 |
HIP 50814 |
17.54 |
| 2026-06-08 00:00 |
10:21:14.81 |
+17:27:16.3 |
HIP 50814 |
17.96 |
| 2026-06-08 12:00 |
10:21:14.65 |
+17:24:42.4 |
HIP 50814 |
18.67 |
| 2026-06-09 00:00 |
10:21:14.66 |
+17:22:08.5 |
HIP 50814 |
19.67 |
| 2026-06-09 12:00 |
10:21:14.84 |
+17:19:34.3 |
HIP 50793 |
19.12 |
| 2026-06-10 00:00 |
10:21:15.18 |
+17:17:00.0 |
HIP 50793 |
17.50 |
| 2026-06-10 12:00 |
10:21:15.70 |
+17:14:25.6 |
HIP 50793 |
16.09 |
| 2026-06-11 00:00 |
10:21:16.37 |
+17:11:51.0 |
HIP 50793 |
14.96 |
| 2026-06-11 12:00 |
10:21:17.21 |
+17:09:16.3 |
HIP 50793 |
14.16 |
| 2026-06-12 00:00 |
10:21:18.22 |
+17:06:41.4 |
HIP 50793 |
13.78 |
| 2026-06-12 12:00 |
10:21:19.38 |
+17:04:06.5 |
HIP 50793 |
13.84 |
| 2026-06-13 00:00 |
10:21:20.70 |
+17:01:31.3 |
HIP 50793 |
14.35 |
| 2026-06-13 12:00 |
10:21:22.18 |
+16:58:56.1 |
HIP 50793 |
15.25 |
| 2026-06-14 00:00 |
10:21:23.81 |
+16:56:20.7 |
HIP 50793 |
16.50 |
| 2026-06-14 12:00 |
10:21:25.60 |
+16:53:45.2 |
HIP 50793 |
18.02 |
| 2026-06-15 00:00 |
10:21:27.54 |
+16:51:09.6 |
HIP 50819 |
17.44 |
| 2026-06-15 12:00 |
10:21:29.63 |
+16:48:33.9 |
HIP 50819 |
16.14 |
| 2026-06-16 00:00 |
10:21:31.87 |
+16:45:58.1 |
HIP 50819 |
15.15 |
| 2026-06-16 12:00 |
10:21:34.26 |
+16:43:22.1 |
HIP 50819 |
14.55 |
| 2026-06-17 00:00 |
10:21:36.79 |
+16:40:46.1 |
HIP 50819 |
14.39 |
| 2026-06-17 12:00 |
10:21:39.47 |
+16:38:10.0 |
HIP 50784 |
12.38 |
| 2026-06-18 00:00 |
10:21:42.29 |
+16:35:33.8 |
HIP 50784 |
9.94 |
| 2026-06-18 12:00 |
10:21:45.25 |
+16:32:57.5 |
HIP 50784 |
7.63 |
| 2026-06-19 00:00 |
10:21:48.36 |
+16:30:21.1 |
HIP 50784 |
5.64 |
| 2026-06-19 12:00 |
10:21:51.60 |
+16:27:44.6 |
HIP 50784 |
4.46 |
| 2026-06-20 00:00 |
10:21:54.97 |
+16:25:08.1 |
HIP 50784 |
4.74 |
| 2026-06-20 12:00 |
10:21:58.48 |
+16:22:31.4 |
HIP 50784 |
6.32 |
| 2026-06-21 00:00 |
10:22:02.13 |
+16:19:54.8 |
HIP 50784 |
8.50 |
| 2026-06-21 12:00 |
10:22:05.90 |
+16:17:18.0 |
HIP 50784 |
10.94 |
| 2026-06-22 00:00 |
10:22:09.81 |
+16:14:41.2 |
HIP 50784 |
13.51 |