| Parameter |
Value |
| Designation |
C/2024 G4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-03-21T16:21:49.705920Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:42:54Z |
| Obs used |
570 |
| 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) |
2025-03-03.0000000 |
| e |
0.99836964 |
| q (au) |
4.900186 |
| a (au) |
3005.591959 |
| i (deg) |
33.026325 |
| Ω (om, deg) |
152.986528 |
| ω (w, deg) |
131.425189 |
| M (ma, deg) |
359.997705 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.248 + 2.893\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.248 |
| n |
2.893 |
| gf |
1.000 |
| gb |
-0.648 |
| 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) |
| 2026-03-26 00:00 |
19:55:40.00 |
+01:59:15.6 |
HIP 97950 |
18.75 |
| 2026-03-26 12:00 |
19:56:02.22 |
+02:00:40.5 |
HIP 97950 |
24.46 |
| 2026-03-27 00:00 |
19:56:24.31 |
+02:02:05.5 |
HIP 97950 |
30.14 |
| 2026-03-27 12:00 |
19:56:46.28 |
+02:03:30.6 |
HIP 97950 |
35.80 |
| 2026-03-28 00:00 |
19:57:08.12 |
+02:04:55.7 |
HIP 98336 |
34.56 |
| 2026-03-28 12:00 |
19:57:29.83 |
+02:06:21.0 |
HIP 98336 |
32.20 |
| 2026-03-29 00:00 |
19:57:51.42 |
+02:07:46.3 |
HIP 98336 |
30.71 |
| 2026-03-29 12:00 |
19:58:12.87 |
+02:09:11.7 |
HIP 98336 |
30.21 |
| 2026-03-30 00:00 |
19:58:34.20 |
+02:10:37.1 |
HIP 98336 |
30.72 |
| 2026-03-30 12:00 |
19:58:55.40 |
+02:12:02.5 |
HIP 98336 |
32.18 |
| 2026-03-31 00:00 |
19:59:16.47 |
+02:13:28.0 |
HIP 98336 |
34.45 |
| 2026-03-31 12:00 |
19:59:37.41 |
+02:14:53.6 |
HIP 98476 |
34.83 |
| 2026-04-01 00:00 |
19:59:58.22 |
+02:16:19.1 |
HIP 98476 |
34.94 |
| 2026-04-01 12:00 |
20:00:18.90 |
+02:17:44.6 |
HIP 98476 |
35.86 |
| 2026-04-02 00:00 |
20:00:39.44 |
+02:19:10.2 |
HIP 98683 |
35.83 |
| 2026-04-02 12:00 |
20:00:59.86 |
+02:20:35.7 |
HIP 98683 |
32.75 |
| 2026-04-03 00:00 |
20:01:20.13 |
+02:22:01.2 |
HIP 98683 |
30.31 |
| 2026-04-03 12:00 |
20:01:40.28 |
+02:23:26.7 |
HIP 98683 |
28.66 |
| 2026-04-04 00:00 |
20:02:00.29 |
+02:24:52.2 |
HIP 98683 |
27.92 |
| 2026-04-04 12:00 |
20:02:20.16 |
+02:26:17.6 |
HIP 98683 |
28.14 |
| 2026-04-05 00:00 |
20:02:39.89 |
+02:27:43.0 |
HIP 98683 |
29.28 |
| 2026-04-05 12:00 |
20:02:59.49 |
+02:29:08.2 |
HIP 98893 |
28.94 |
| 2026-04-06 00:00 |
20:03:18.95 |
+02:30:33.5 |
HIP 98893 |
24.30 |
| 2026-04-06 12:00 |
20:03:38.28 |
+02:31:58.6 |
HIP 98893 |
19.90 |
| 2026-04-07 00:00 |
20:03:57.46 |
+02:33:23.7 |
HIP 98893 |
15.91 |
| 2026-04-07 12:00 |
20:04:16.50 |
+02:34:48.6 |
HIP 98893 |
12.68 |
| 2026-04-08 00:00 |
20:04:35.41 |
+02:36:13.4 |
HIP 98893 |
10.86 |
| 2026-04-08 12:00 |
20:04:54.17 |
+02:37:38.2 |
HIP 98893 |
11.12 |
| 2026-04-09 00:00 |
20:05:12.79 |
+02:39:02.7 |
HIP 98893 |
13.31 |
| 2026-04-09 12:00 |
20:05:31.26 |
+02:40:27.2 |
HIP 98893 |
16.64 |
| 2026-04-10 00:00 |
20:05:49.59 |
+02:41:51.5 |
HIP 98893 |
20.55 |
| 2026-04-10 12:00 |
20:06:07.78 |
+02:43:15.6 |
HIP 98893 |
24.74 |
| 2026-04-11 00:00 |
20:06:25.82 |
+02:44:39.6 |
HIP 99149 |
26.59 |
| 2026-04-11 12:00 |
20:06:43.72 |
+02:46:03.3 |
HIP 99149 |
24.60 |
| 2026-04-12 00:00 |
20:07:01.47 |
+02:47:26.9 |
HIP 99149 |
23.40 |
| 2026-04-12 12:00 |
20:07:19.07 |
+02:48:50.3 |
HIP 99149 |
23.10 |
| 2026-04-13 00:00 |
20:07:36.53 |
+02:50:13.5 |
HIP 99149 |
23.71 |
| 2026-04-13 12:00 |
20:07:53.83 |
+02:51:36.4 |
HIP 99149 |
25.15 |
| 2026-04-14 00:00 |
20:08:10.99 |
+02:52:59.1 |
HIP 99149 |
27.26 |
| 2026-04-14 12:00 |
20:08:27.99 |
+02:54:21.5 |
HIP 99149 |
29.88 |
| 2026-04-15 00:00 |
20:08:44.84 |
+02:55:43.7 |
HIP 99149 |
32.88 |
| 2026-04-15 12:00 |
20:09:01.55 |
+02:57:05.6 |
HIP 99149 |
36.16 |
| 2026-04-16 00:00 |
20:09:18.09 |
+02:58:27.3 |
HIP 99149 |
39.62 |