C/2024 G4 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2024 G4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-03-21T16:23:23.372160Z |
| Orbit solution date (soln_date, UTC) |
2025-11-04T12:42:53Z |
| Obs used |
568 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
7.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-04-10T12:57:43.084800Z |
| Discovery magnitude (MPC) |
21.12 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-03-02.0000000 |
| e |
0.99836789 |
| q (au) |
4.900178 |
| a (au) |
3002.360253 |
| i (deg) |
33.026324 |
| Ω (om, deg) |
152.986572 |
| ω (w, deg) |
131.425320 |
| M (ma, deg) |
359.997695 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.858 + 3.671\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.858 |
| n |
3.671 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:09:06.41 |
+00:08:45.7 |
HIP 94148 |
28.17 |
| 2026-02-03 12:00 |
19:09:37.62 |
+00:09:19.3 |
HIP 94148 |
26.71 |
| 2026-02-04 00:00 |
19:10:08.77 |
+00:09:53.7 |
HIP 94295 |
25.83 |
| 2026-02-04 12:00 |
19:10:39.88 |
+00:10:28.9 |
HIP 94295 |
20.20 |
| 2026-02-05 00:00 |
19:11:10.93 |
+00:11:04.9 |
HIP 94295 |
16.47 |
| 2026-02-05 12:00 |
19:11:41.93 |
+00:11:41.7 |
HIP 94295 |
16.00 |
| 2026-02-06 00:00 |
19:12:12.88 |
+00:12:19.3 |
HIP 94295 |
19.02 |
| 2026-02-06 12:00 |
19:12:43.77 |
+00:12:57.7 |
HIP 94496 |
19.48 |
| 2026-02-07 00:00 |
19:13:14.60 |
+00:13:36.9 |
HIP 94496 |
12.57 |
| 2026-02-07 12:00 |
19:13:45.38 |
+00:14:16.9 |
HIP 94496 |
7.51 |
| 2026-02-08 00:00 |
19:14:16.11 |
+00:14:57.6 |
HIP 94496 |
8.62 |
| 2026-02-08 12:00 |
19:14:46.77 |
+00:15:39.1 |
HIP 94496 |
14.52 |
| 2026-02-09 00:00 |
19:15:17.38 |
+00:16:21.4 |
HIP 94496 |
21.58 |
| 2026-02-09 12:00 |
19:15:47.93 |
+00:17:04.5 |
HIP 94785 |
24.39 |
| 2026-02-10 00:00 |
19:16:18.42 |
+00:17:48.3 |
HIP 94785 |
17.83 |
| 2026-02-10 12:00 |
19:16:48.85 |
+00:18:32.9 |
HIP 94785 |
12.58 |
| 2026-02-11 00:00 |
19:17:19.22 |
+00:19:18.3 |
HIP 94785 |
10.74 |
| 2026-02-11 12:00 |
19:17:49.53 |
+00:20:04.3 |
HIP 94883 |
11.72 |
| 2026-02-12 00:00 |
19:18:19.77 |
+00:20:51.2 |
HIP 94883 |
5.38 |
| 2026-02-12 12:00 |
19:18:49.95 |
+00:21:38.7 |
HIP 94913 |
1.33 |
| 2026-02-13 00:00 |
19:19:20.07 |
+00:22:27.0 |
HIP 94913 |
7.58 |
| 2026-02-13 12:00 |
19:19:50.12 |
+00:23:16.0 |
HIP 94913 |
15.08 |
| 2026-02-14 00:00 |
19:20:20.10 |
+00:24:05.7 |
HIP 95155 |
19.14 |
| 2026-02-14 12:00 |
19:20:50.02 |
+00:24:56.2 |
HIP 95155 |
11.62 |
| 2026-02-15 00:00 |
19:21:19.87 |
+00:25:47.3 |
HIP 95155 |
4.12 |
| 2026-02-15 12:00 |
19:21:49.65 |
+00:26:39.2 |
HIP 95155 |
3.41 |
| 2026-02-16 00:00 |
19:22:19.36 |
+00:27:31.7 |
HIP 95221 |
4.58 |
| 2026-02-16 12:00 |
19:22:49.00 |
+00:28:25.0 |
HIP 95221 |
8.81 |
| 2026-02-17 00:00 |
19:23:18.57 |
+00:29:18.9 |
HIP 95221 |
15.66 |
| 2026-02-17 12:00 |
19:23:48.07 |
+00:30:13.5 |
HIP 95221 |
22.87 |
| 2026-02-18 00:00 |
19:24:17.50 |
+00:31:08.7 |
HIP 95221 |
30.18 |
| 2026-02-18 12:00 |
19:24:46.85 |
+00:32:04.6 |
HIP 95585 |
28.59 |
| 2026-02-19 00:00 |
19:25:16.13 |
+00:33:01.2 |
HIP 95585 |
22.64 |
| 2026-02-19 12:00 |
19:25:45.34 |
+00:33:58.4 |
HIP 95585 |
17.82 |
| 2026-02-20 00:00 |
19:26:14.47 |
+00:34:56.3 |
HIP 95585 |
15.20 |
| 2026-02-20 12:00 |
19:26:43.52 |
+00:35:54.8 |
HIP 95585 |
15.91 |
| 2026-02-21 00:00 |
19:27:12.49 |
+00:36:53.9 |
HIP 95585 |
19.55 |
| 2026-02-21 12:00 |
19:27:41.39 |
+00:37:53.7 |
HIP 95749 |
18.00 |
| 2026-02-22 00:00 |
19:28:10.21 |
+00:38:54.0 |
HIP 95749 |
15.33 |
| 2026-02-22 12:00 |
19:28:38.95 |
+00:39:55.0 |
HIP 95829 |
14.41 |
| 2026-02-23 00:00 |
19:29:07.60 |
+00:40:56.5 |
HIP 95829 |
10.34 |
| 2026-02-23 12:00 |
19:29:36.18 |
+00:41:58.7 |
HIP 95829 |
10.54 |
| 2026-02-24 00:00 |
19:30:04.68 |
+00:43:01.4 |
HIP 95829 |
14.81 |