| 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
$$
M_a = (5.699 + 5.974\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.699 |
| n |
5.974 |
| gf |
0.924 |
| gb |
-0.926 |
| k |
1.000 |
| δ90 |
5.864 |
| 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) |
| 2026-05-12 00:00 |
09:31:28.20 |
+14:21:32.5 |
HIP 46864 |
21.88 |
| 2026-05-12 12:00 |
09:31:37.08 |
+14:20:42.7 |
HIP 46864 |
19.90 |
| 2026-05-13 00:00 |
09:31:46.07 |
+14:19:52.4 |
HIP 46864 |
17.96 |
| 2026-05-13 12:00 |
09:31:55.18 |
+14:19:01.4 |
HIP 46864 |
16.10 |
| 2026-05-14 00:00 |
09:32:04.41 |
+14:18:09.9 |
HIP 46864 |
14.37 |
| 2026-05-14 12:00 |
09:32:13.76 |
+14:17:17.8 |
HIP 46864 |
12.84 |
| 2026-05-15 00:00 |
09:32:23.22 |
+14:16:25.1 |
HIP 46864 |
11.60 |
| 2026-05-15 12:00 |
09:32:32.80 |
+14:15:31.8 |
HIP 46864 |
10.78 |
| 2026-05-16 00:00 |
09:32:42.50 |
+14:14:37.9 |
HIP 46864 |
10.50 |
| 2026-05-16 12:00 |
09:32:52.31 |
+14:13:43.5 |
HIP 46864 |
10.81 |
| 2026-05-17 00:00 |
09:33:02.24 |
+14:12:48.5 |
HIP 46864 |
11.70 |
| 2026-05-17 12:00 |
09:33:12.28 |
+14:11:52.9 |
HIP 46864 |
13.06 |
| 2026-05-18 00:00 |
09:33:22.43 |
+14:10:56.8 |
HIP 46864 |
14.77 |
| 2026-05-18 12:00 |
09:33:32.69 |
+14:10:00.0 |
HIP 46864 |
16.75 |
| 2026-05-19 00:00 |
09:33:43.07 |
+14:09:02.7 |
HIP 46864 |
18.92 |
| 2026-05-19 12:00 |
09:33:53.56 |
+14:08:04.9 |
HIP 47035 |
18.75 |
| 2026-05-20 00:00 |
09:34:04.16 |
+14:07:06.5 |
HIP 47035 |
16.05 |
| 2026-05-20 12:00 |
09:34:14.86 |
+14:06:07.5 |
HIP 47035 |
13.35 |
| 2026-05-21 00:00 |
09:34:25.68 |
+14:05:08.0 |
HIP 47035 |
10.65 |
| 2026-05-21 12:00 |
09:34:36.60 |
+14:04:07.9 |
HIP 47035 |
7.99 |
| 2026-05-22 00:00 |
09:34:47.64 |
+14:03:07.3 |
HIP 47035 |
5.49 |
| 2026-05-22 12:00 |
09:34:58.77 |
+14:02:06.1 |
HIP 47035 |
3.57 |
| 2026-05-23 00:00 |
09:35:10.02 |
+14:01:04.4 |
HIP 47035 |
3.47 |
| 2026-05-23 12:00 |
09:35:21.36 |
+14:00:02.2 |
HIP 47035 |
5.34 |
| 2026-05-24 00:00 |
09:35:32.82 |
+13:58:59.4 |
HIP 47035 |
7.92 |
| 2026-05-24 12:00 |
09:35:44.37 |
+13:57:56.0 |
HIP 47038 |
10.65 |
| 2026-05-25 00:00 |
09:35:56.03 |
+13:56:52.1 |
HIP 47038 |
13.50 |
| 2026-05-25 12:00 |
09:36:07.79 |
+13:55:47.7 |
HIP 47038 |
16.45 |
| 2026-05-26 00:00 |
09:36:19.65 |
+13:54:42.8 |
HIP 47038 |
19.45 |
| 2026-05-26 12:00 |
09:36:31.61 |
+13:53:37.4 |
HIP 47038 |
22.49 |
| 2026-05-27 00:00 |
09:36:43.67 |
+13:52:31.4 |
HIP 47038 |
25.58 |
| 2026-05-27 12:00 |
09:36:55.83 |
+13:51:24.9 |
HIP 47038 |
28.70 |
| 2026-05-28 00:00 |
09:37:08.08 |
+13:50:17.8 |
HIP 47038 |
31.85 |
| 2026-05-28 12:00 |
09:37:20.44 |
+13:49:10.3 |
HIP 47149 |
32.88 |
| 2026-05-29 00:00 |
09:37:32.89 |
+13:48:02.2 |
HIP 47149 |
33.19 |
| 2026-05-29 12:00 |
09:37:45.43 |
+13:46:53.7 |
HIP 47149 |
33.81 |
| 2026-05-30 00:00 |
09:37:58.08 |
+13:45:44.6 |
HIP 47388 |
33.15 |
| 2026-05-30 12:00 |
09:38:10.81 |
+13:44:35.0 |
HIP 47388 |
30.47 |
| 2026-05-31 00:00 |
09:38:23.64 |
+13:43:24.9 |
HIP 47388 |
27.90 |
| 2026-05-31 12:00 |
09:38:36.56 |
+13:42:14.3 |
HIP 47388 |
25.48 |
| 2026-06-01 00:00 |
09:38:49.58 |
+13:41:03.2 |
HIP 47388 |
23.29 |
| 2026-06-01 12:00 |
09:39:02.69 |
+13:39:51.6 |
HIP 47388 |
21.40 |
| 2026-06-02 00:00 |
09:39:15.89 |
+13:38:39.5 |
HIP 47388 |
19.91 |