| Parameter |
Value |
| Designation |
C/2024 C2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-10T09:41:40.943040Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T13:42:26Z |
| Obs used |
65 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-01T10:02:20.169600Z |
| Discovery magnitude (MPC) |
20.52 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-02-05.0000000 |
| e |
0.44399030 |
| q (au) |
8.991478 |
| a (au) |
16.171441 |
| i (deg) |
27.284750 |
| Ω (om, deg) |
66.444490 |
| ω (w, deg) |
87.533754 |
| M (ma, deg) |
353.946684 |
Magnitude
Scatter + Global Linear
$$
M_a = (1.227 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
1.227 |
| n |
6.000 |
| gf |
0.906 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
6.840 |
| 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) |
| 2026-06-01 00:00 |
12:03:24.73 |
+28:49:13.7 |
HIP 58777 |
18.06 |
| 2026-06-01 12:00 |
12:03:24.90 |
+28:47:27.9 |
HIP 58777 |
19.82 |
| 2026-06-02 00:00 |
12:03:25.19 |
+28:45:41.5 |
HIP 58777 |
21.59 |
| 2026-06-02 12:00 |
12:03:25.58 |
+28:43:54.5 |
HIP 58777 |
23.38 |
| 2026-06-03 00:00 |
12:03:26.08 |
+28:42:06.9 |
HIP 58777 |
25.18 |
| 2026-06-03 12:00 |
12:03:26.69 |
+28:40:18.6 |
HIP 58777 |
26.99 |
| 2026-06-04 00:00 |
12:03:27.40 |
+28:38:29.7 |
HIP 58971 |
28.25 |
| 2026-06-04 12:00 |
12:03:28.22 |
+28:36:40.3 |
HIP 58971 |
27.60 |
| 2026-06-05 00:00 |
12:03:29.14 |
+28:34:50.2 |
HIP 58971 |
27.04 |
| 2026-06-05 12:00 |
12:03:30.18 |
+28:32:59.5 |
HIP 58971 |
26.58 |
| 2026-06-06 00:00 |
12:03:31.31 |
+28:31:08.3 |
HIP 58971 |
26.21 |
| 2026-06-06 12:00 |
12:03:32.56 |
+28:29:16.4 |
HIP 58971 |
25.95 |
| 2026-06-07 00:00 |
12:03:33.91 |
+28:27:24.0 |
HIP 58838 |
24.74 |
| 2026-06-07 12:00 |
12:03:35.37 |
+28:25:31.1 |
HIP 58838 |
22.84 |
| 2026-06-08 00:00 |
12:03:36.93 |
+28:23:37.5 |
HIP 58838 |
20.93 |
| 2026-06-08 12:00 |
12:03:38.60 |
+28:21:43.4 |
HIP 58838 |
19.01 |
| 2026-06-09 00:00 |
12:03:40.38 |
+28:19:48.8 |
HIP 58838 |
17.07 |
| 2026-06-09 12:00 |
12:03:42.26 |
+28:17:53.6 |
HIP 58838 |
15.12 |
| 2026-06-10 00:00 |
12:03:44.25 |
+28:15:57.8 |
HIP 58838 |
13.16 |
| 2026-06-10 12:00 |
12:03:46.34 |
+28:14:01.6 |
HIP 58838 |
11.18 |
| 2026-06-11 00:00 |
12:03:48.54 |
+28:12:04.8 |
HIP 58838 |
9.20 |
| 2026-06-11 12:00 |
12:03:50.85 |
+28:10:07.5 |
HIP 58838 |
7.21 |
| 2026-06-12 00:00 |
12:03:53.26 |
+28:08:09.6 |
HIP 58838 |
5.22 |
| 2026-06-12 12:00 |
12:03:55.77 |
+28:06:11.3 |
HIP 58838 |
3.28 |
| 2026-06-13 00:00 |
12:03:58.39 |
+28:04:12.5 |
HIP 58838 |
1.59 |
| 2026-06-13 12:00 |
12:04:01.12 |
+28:02:13.1 |
HIP 58838 |
1.67 |
| 2026-06-14 00:00 |
12:04:03.95 |
+28:00:13.3 |
HIP 58838 |
3.42 |
| 2026-06-14 12:00 |
12:04:06.88 |
+27:58:13.0 |
HIP 58838 |
5.43 |
| 2026-06-15 00:00 |
12:04:09.92 |
+27:56:12.2 |
HIP 58838 |
7.51 |
| 2026-06-15 12:00 |
12:04:13.07 |
+27:54:11.0 |
HIP 58838 |
9.62 |
| 2026-06-16 00:00 |
12:04:16.31 |
+27:52:09.3 |
HIP 58838 |
11.75 |
| 2026-06-16 12:00 |
12:04:19.66 |
+27:50:07.1 |
HIP 58838 |
13.90 |
| 2026-06-17 00:00 |
12:04:23.12 |
+27:48:04.5 |
HIP 58838 |
16.06 |
| 2026-06-17 12:00 |
12:04:26.67 |
+27:46:01.4 |
HIP 58838 |
18.25 |
| 2026-06-18 00:00 |
12:04:30.33 |
+27:43:58.0 |
HIP 58838 |
20.45 |
| 2026-06-18 12:00 |
12:04:34.10 |
+27:41:54.1 |
HIP 58838 |
22.66 |
| 2026-06-19 00:00 |
12:04:37.96 |
+27:39:49.7 |
HIP 59033 |
23.08 |
| 2026-06-19 12:00 |
12:04:41.93 |
+27:37:45.0 |
HIP 59033 |
21.45 |
| 2026-06-20 00:00 |
12:04:45.99 |
+27:35:39.8 |
HIP 59033 |
19.93 |
| 2026-06-20 12:00 |
12:04:50.16 |
+27:33:34.3 |
HIP 59033 |
18.53 |
| 2026-06-21 00:00 |
12:04:54.43 |
+27:31:28.4 |
HIP 59033 |
17.30 |
| 2026-06-21 12:00 |
12:04:58.80 |
+27:29:22.0 |
HIP 59033 |
16.28 |
| 2026-06-22 00:00 |
12:05:03.27 |
+27:27:15.3 |
HIP 59033 |
15.52 |