C/2024 O1 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2024 O1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-01-29T05:12:09.480960Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:19Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
13.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-28T09:31:08.832000Z |
| Discovery magnitude (MPC) |
21.04 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-03-10.0000000 |
| e |
1.00181627 |
| q (au) |
6.608493 |
| a (au) |
-3638.502297 |
| i (deg) |
59.066490 |
| Ω (om, deg) |
303.331127 |
| ω (w, deg) |
349.939425 |
| M (ma, deg) |
0.001822 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.575 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.575 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.890 |
| k |
0.800 |
| 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 |
21:33:33.64 |
+32:03:56.3 |
HIP 106572 |
25.24 |
| 2026-02-03 12:00 |
21:33:48.34 |
+32:05:21.6 |
HIP 106572 |
24.08 |
| 2026-02-04 00:00 |
21:34:03.04 |
+32:06:47.8 |
HIP 106572 |
23.38 |
| 2026-02-04 12:00 |
21:34:17.75 |
+32:08:15.0 |
HIP 106572 |
23.20 |
| 2026-02-05 00:00 |
21:34:32.47 |
+32:09:43.1 |
HIP 106572 |
23.53 |
| 2026-02-05 12:00 |
21:34:47.19 |
+32:11:12.1 |
HIP 106690 |
23.12 |
| 2026-02-06 00:00 |
21:35:01.92 |
+32:12:42.1 |
HIP 106690 |
20.51 |
| 2026-02-06 12:00 |
21:35:16.65 |
+32:14:13.0 |
HIP 106690 |
18.20 |
| 2026-02-07 00:00 |
21:35:31.39 |
+32:15:44.9 |
HIP 106690 |
16.31 |
| 2026-02-07 12:00 |
21:35:46.13 |
+32:17:17.7 |
HIP 106692 |
13.42 |
| 2026-02-08 00:00 |
21:36:00.88 |
+32:18:51.4 |
HIP 106692 |
10.05 |
| 2026-02-08 12:00 |
21:36:15.62 |
+32:20:26.1 |
HIP 106692 |
6.76 |
| 2026-02-09 00:00 |
21:36:30.37 |
+32:22:01.7 |
HIP 106692 |
3.85 |
| 2026-02-09 12:00 |
21:36:45.11 |
+32:23:38.2 |
HIP 106692 |
2.89 |
| 2026-02-10 00:00 |
21:36:59.86 |
+32:25:15.6 |
HIP 106692 |
5.14 |
| 2026-02-10 12:00 |
21:37:14.61 |
+32:26:53.9 |
HIP 106692 |
8.31 |
| 2026-02-11 00:00 |
21:37:29.35 |
+32:28:33.2 |
HIP 106692 |
11.68 |
| 2026-02-11 12:00 |
21:37:44.10 |
+32:30:13.4 |
HIP 106692 |
15.13 |
| 2026-02-12 00:00 |
21:37:58.84 |
+32:31:54.5 |
HIP 106692 |
18.61 |
| 2026-02-12 12:00 |
21:38:13.58 |
+32:33:36.5 |
HIP 106692 |
22.11 |
| 2026-02-13 00:00 |
21:38:28.31 |
+32:35:19.4 |
HIP 106692 |
25.63 |
| 2026-02-13 12:00 |
21:38:43.04 |
+32:37:03.2 |
HIP 107048 |
29.01 |
| 2026-02-14 00:00 |
21:38:57.77 |
+32:38:47.9 |
HIP 107048 |
25.47 |
| 2026-02-14 12:00 |
21:39:12.49 |
+32:40:33.5 |
HIP 107048 |
21.94 |
| 2026-02-15 00:00 |
21:39:27.20 |
+32:42:20.0 |
HIP 107048 |
18.41 |
| 2026-02-15 12:00 |
21:39:41.90 |
+32:44:07.4 |
HIP 107048 |
14.90 |
| 2026-02-16 00:00 |
21:39:56.60 |
+32:45:55.7 |
HIP 107048 |
11.42 |
| 2026-02-16 12:00 |
21:40:11.29 |
+32:47:44.9 |
HIP 107048 |
8.04 |
| 2026-02-17 00:00 |
21:40:25.96 |
+32:49:34.9 |
HIP 107048 |
4.95 |
| 2026-02-17 12:00 |
21:40:40.63 |
+32:51:25.9 |
HIP 107048 |
3.22 |
| 2026-02-18 00:00 |
21:40:55.29 |
+32:53:17.7 |
HIP 107048 |
4.70 |
| 2026-02-18 12:00 |
21:41:09.94 |
+32:55:10.4 |
HIP 107048 |
7.74 |
| 2026-02-19 00:00 |
21:41:24.57 |
+32:57:03.9 |
HIP 107121 |
8.80 |
| 2026-02-19 12:00 |
21:41:39.19 |
+32:58:58.3 |
HIP 107121 |
5.22 |
| 2026-02-20 00:00 |
21:41:53.80 |
+33:00:53.6 |
HIP 107121 |
1.74 |
| 2026-02-20 12:00 |
21:42:08.39 |
+33:02:49.7 |
HIP 107121 |
2.23 |
| 2026-02-21 00:00 |
21:42:22.97 |
+33:04:46.7 |
HIP 107121 |
5.76 |
| 2026-02-21 12:00 |
21:42:37.53 |
+33:06:44.5 |
HIP 107121 |
9.36 |
| 2026-02-22 00:00 |
21:42:52.07 |
+33:08:43.2 |
HIP 107121 |
12.98 |
| 2026-02-22 12:00 |
21:43:06.60 |
+33:10:42.7 |
HIP 107308 |
15.07 |
| 2026-02-23 00:00 |
21:43:21.11 |
+33:12:43.1 |
HIP 107308 |
11.45 |
| 2026-02-23 12:00 |
21:43:35.60 |
+33:14:44.3 |
HIP 107308 |
7.85 |
| 2026-02-24 00:00 |
21:43:50.07 |
+33:16:46.3 |
HIP 107308 |
4.29 |