| Parameter |
Value |
| Designation |
C/2024 Q4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-11T17:40:59.986560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:40Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-08-31T14:37:17.472000Z |
| Discovery magnitude (MPC) |
21.16 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-10-29.0000000 |
| e |
0.99600257 |
| q (au) |
5.418751 |
| a (au) |
1355.557776 |
| i (deg) |
3.309199 |
| Ω (om, deg) |
324.348085 |
| ω (w, deg) |
132.914334 |
| M (ma, deg) |
359.999729 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.808 + 5.920\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.808 |
| n |
5.920 |
| gf |
0.923 |
| gb |
-0.926 |
| k |
1.000 |
| δ90 |
5.584 |
| 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 |
10:11:32.11 |
+10:36:48.8 |
HIP 50009 |
24.32 |
| 2026-07-29 12:00 |
10:11:51.47 |
+10:34:55.1 |
HIP 50009 |
20.03 |
| 2026-07-30 00:00 |
10:12:10.85 |
+10:33:01.2 |
HIP 50009 |
16.21 |
| 2026-07-30 12:00 |
10:12:30.25 |
+10:31:07.1 |
HIP 50009 |
13.30 |
| 2026-07-31 00:00 |
10:12:49.67 |
+10:29:12.8 |
HIP 50009 |
11.99 |
| 2026-07-31 12:00 |
10:13:09.11 |
+10:27:18.2 |
HIP 50009 |
12.79 |
| 2026-08-01 00:00 |
10:13:28.56 |
+10:25:23.5 |
HIP 50146 |
11.89 |
| 2026-08-01 12:00 |
10:13:48.03 |
+10:23:28.6 |
HIP 50146 |
9.20 |
| 2026-08-02 00:00 |
10:14:07.52 |
+10:21:33.5 |
HIP 50146 |
8.99 |
| 2026-08-02 12:00 |
10:14:27.02 |
+10:19:38.2 |
HIP 50146 |
11.42 |
| 2026-08-03 00:00 |
10:14:46.53 |
+10:17:42.7 |
HIP 50146 |
15.29 |
| 2026-08-03 12:00 |
10:15:06.06 |
+10:15:47.0 |
HIP 50146 |
19.76 |
| 2026-08-04 00:00 |
10:15:25.60 |
+10:13:51.1 |
HIP 50146 |
24.52 |
| 2026-08-04 12:00 |
10:15:45.16 |
+10:11:55.1 |
HIP 50370 |
19.80 |
| 2026-08-05 00:00 |
10:16:04.73 |
+10:09:58.9 |
HIP 50370 |
14.66 |
| 2026-08-05 12:00 |
10:16:24.31 |
+10:08:02.5 |
HIP 50370 |
9.58 |
| 2026-08-06 00:00 |
10:16:43.91 |
+10:06:05.9 |
HIP 50370 |
4.74 |
| 2026-08-06 12:00 |
10:17:03.52 |
+10:04:09.1 |
HIP 50370 |
2.71 |
| 2026-08-07 00:00 |
10:17:23.13 |
+10:02:12.2 |
HIP 50370 |
6.81 |
| 2026-08-07 12:00 |
10:17:42.76 |
+10:00:15.1 |
HIP 50370 |
11.82 |
| 2026-08-08 00:00 |
10:18:02.40 |
+09:58:17.8 |
HIP 50496 |
13.41 |
| 2026-08-08 12:00 |
10:18:22.05 |
+09:56:20.4 |
HIP 50496 |
12.33 |
| 2026-08-09 00:00 |
10:18:41.70 |
+09:54:22.8 |
HIP 50547 |
11.44 |
| 2026-08-09 12:00 |
10:19:01.37 |
+09:52:25.1 |
HIP 50547 |
7.14 |
| 2026-08-10 00:00 |
10:19:21.04 |
+09:50:27.2 |
HIP 50547 |
5.07 |
| 2026-08-10 12:00 |
10:19:40.72 |
+09:48:29.2 |
HIP 50543 |
6.36 |
| 2026-08-11 00:00 |
10:20:00.41 |
+09:46:31.0 |
HIP 50543 |
9.06 |
| 2026-08-11 12:00 |
10:20:20.10 |
+09:44:32.7 |
HIP 50543 |
13.37 |
| 2026-08-12 00:00 |
10:20:39.80 |
+09:42:34.3 |
HIP 50543 |
18.17 |
| 2026-08-12 12:00 |
10:20:59.50 |
+09:40:35.7 |
HIP 50812 |
22.42 |
| 2026-08-13 00:00 |
10:21:19.21 |
+09:38:36.9 |
HIP 50812 |
18.73 |
| 2026-08-13 12:00 |
10:21:38.92 |
+09:36:38.1 |
HIP 50812 |
15.94 |
| 2026-08-14 00:00 |
10:21:58.63 |
+09:34:39.1 |
HIP 50812 |
14.58 |
| 2026-08-14 12:00 |
10:22:18.35 |
+09:32:40.0 |
HIP 50812 |
15.04 |
| 2026-08-15 00:00 |
10:22:38.07 |
+09:30:40.8 |
HIP 50812 |
17.17 |
| 2026-08-15 12:00 |
10:22:57.79 |
+09:28:41.5 |
HIP 50812 |
20.46 |
| 2026-08-16 00:00 |
10:23:17.51 |
+09:26:42.1 |
HIP 50812 |
24.45 |
| 2026-08-16 12:00 |
10:23:37.23 |
+09:24:42.5 |
HIP 51004 |
25.56 |
| 2026-08-17 00:00 |
10:23:56.95 |
+09:22:42.9 |
HIP 51004 |
22.51 |
| 2026-08-17 12:00 |
10:24:16.67 |
+09:20:43.2 |
HIP 51004 |
20.37 |
| 2026-08-18 00:00 |
10:24:36.39 |
+09:18:43.3 |
HIP 51004 |
19.45 |
| 2026-08-18 12:00 |
10:24:56.11 |
+09:16:43.4 |
HIP 51004 |
19.93 |
| 2026-08-19 00:00 |
10:25:15.83 |
+09:14:43.4 |
HIP 51004 |
21.71 |