C/2024 Q3 (PANSTARRS)
| 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 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
12:24:05.50 |
+19:28:19.2 |
HIP 60423 |
15.45 |
| 2026-02-03 12:00 |
12:23:27.17 |
+19:30:51.3 |
HIP 60423 |
8.88 |
| 2026-02-04 00:00 |
12:22:48.54 |
+19:33:23.3 |
HIP 60423 |
9.79 |
| 2026-02-04 12:00 |
12:22:09.63 |
+19:35:55.2 |
HIP 60423 |
17.13 |
| 2026-02-05 00:00 |
12:21:30.42 |
+19:38:26.9 |
HIP 60423 |
25.99 |
| 2026-02-05 12:00 |
12:20:50.93 |
+19:40:58.5 |
HIP 60193 |
23.10 |
| 2026-02-06 00:00 |
12:20:11.16 |
+19:43:29.9 |
HIP 60193 |
21.39 |
| 2026-02-06 12:00 |
12:19:31.11 |
+19:46:00.9 |
HIP 60046 |
15.97 |
| 2026-02-07 00:00 |
12:18:50.79 |
+19:48:31.7 |
HIP 60046 |
10.61 |
| 2026-02-07 12:00 |
12:18:10.19 |
+19:51:02.2 |
HIP 60046 |
12.80 |
| 2026-02-08 00:00 |
12:17:29.33 |
+19:53:32.2 |
HIP 60046 |
20.30 |
| 2026-02-08 12:00 |
12:16:48.21 |
+19:56:01.9 |
HIP 59812 |
12.26 |
| 2026-02-09 00:00 |
12:16:06.82 |
+19:58:31.0 |
HIP 59812 |
4.22 |
| 2026-02-09 12:00 |
12:15:25.18 |
+20:00:59.7 |
HIP 59812 |
9.37 |
| 2026-02-10 00:00 |
12:14:43.28 |
+20:03:27.8 |
HIP 59812 |
19.06 |
| 2026-02-10 12:00 |
12:14:01.14 |
+20:05:55.3 |
HIP 59525 |
28.86 |
| 2026-02-11 00:00 |
12:13:18.76 |
+20:08:22.1 |
HIP 59525 |
23.95 |
| 2026-02-11 12:00 |
12:12:36.14 |
+20:10:48.3 |
HIP 59501 |
22.61 |
| 2026-02-12 00:00 |
12:11:53.28 |
+20:13:13.8 |
HIP 59501 |
19.66 |
| 2026-02-12 12:00 |
12:11:10.19 |
+20:15:38.5 |
HIP 59333 |
14.26 |
| 2026-02-13 00:00 |
12:10:26.88 |
+20:18:02.4 |
HIP 59333 |
9.49 |
| 2026-02-13 12:00 |
12:09:43.35 |
+20:20:25.4 |
HIP 59333 |
13.97 |
| 2026-02-14 00:00 |
12:08:59.60 |
+20:22:47.6 |
HIP 59333 |
22.84 |
| 2026-02-14 12:00 |
12:08:15.64 |
+20:25:08.8 |
HIP 59078 |
19.24 |
| 2026-02-15 00:00 |
12:07:31.48 |
+20:27:29.1 |
HIP 59078 |
8.64 |
| 2026-02-15 12:00 |
12:06:47.11 |
+20:29:48.3 |
HIP 59078 |
2.02 |
| 2026-02-16 00:00 |
12:06:02.56 |
+20:32:06.5 |
HIP 59078 |
12.70 |
| 2026-02-16 12:00 |
12:05:17.81 |
+20:34:23.5 |
HIP 58935 |
21.18 |
| 2026-02-17 00:00 |
12:04:32.88 |
+20:36:39.5 |
HIP 58935 |
24.34 |
| 2026-02-17 12:00 |
12:03:47.77 |
+20:38:54.2 |
HIP 58935 |
31.13 |
| 2026-02-18 00:00 |
12:03:02.49 |
+20:41:07.7 |
HIP 58612 |
34.86 |
| 2026-02-18 12:00 |
12:02:17.05 |
+20:43:20.0 |
HIP 58546 |
28.65 |
| 2026-02-19 00:00 |
12:01:31.44 |
+20:45:31.0 |
HIP 58546 |
19.56 |
| 2026-02-19 12:00 |
12:00:45.68 |
+20:47:40.6 |
HIP 58546 |
13.46 |
| 2026-02-20 00:00 |
11:59:59.78 |
+20:49:48.8 |
HIP 58471 |
8.05 |
| 2026-02-20 12:00 |
11:59:13.73 |
+20:51:55.6 |
HIP 58471 |
3.09 |
| 2026-02-21 00:00 |
11:58:27.55 |
+20:54:01.0 |
HIP 58471 |
13.98 |
| 2026-02-21 12:00 |
11:57:41.23 |
+20:56:04.8 |
HIP 58471 |
24.98 |
| 2026-02-22 00:00 |
11:56:54.80 |
+20:58:07.2 |
HIP 58161 |
26.88 |
| 2026-02-22 12:00 |
11:56:08.24 |
+21:00:07.9 |
HIP 58161 |
19.76 |
| 2026-02-23 00:00 |
11:55:21.58 |
+21:02:07.1 |
HIP 58161 |
17.41 |
| 2026-02-23 12:00 |
11:54:34.82 |
+21:04:04.6 |
HIP 57951 |
20.49 |
| 2026-02-24 00:00 |
11:53:47.95 |
+21:06:00.5 |
HIP 57951 |
10.73 |