P/2024 J1 (PANSTARRS)
| Parameter |
Value |
| Designation |
P/2024 J1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-11-11T02:06:45.757440Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:19Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-05-01T07:34:25.766400Z |
| Discovery magnitude (MPC) |
20.82 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-05-01.0000000 |
| e |
0.30729596 |
| q (au) |
2.637543 |
| a (au) |
3.807605 |
| i (deg) |
13.160370 |
| Ω (om, deg) |
321.961732 |
| ω (w, deg) |
200.324508 |
| M (ma, deg) |
22.805121 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.841 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.841 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.544 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:21:48.02 |
-23:44:49.4 |
HIP 100386 |
16.78 |
| 2026-02-03 12:00 |
20:22:20.11 |
-23:42:39.8 |
HIP 100386 |
18.19 |
| 2026-02-04 00:00 |
20:22:52.16 |
-23:40:30.1 |
HIP 100386 |
22.30 |
| 2026-02-04 12:00 |
20:23:24.15 |
-23:38:20.3 |
HIP 100633 |
16.04 |
| 2026-02-05 00:00 |
20:23:56.09 |
-23:36:10.4 |
HIP 100633 |
9.34 |
| 2026-02-05 12:00 |
20:24:27.99 |
-23:34:00.4 |
HIP 100633 |
5.79 |
| 2026-02-06 00:00 |
20:24:59.83 |
-23:31:50.3 |
HIP 100633 |
9.79 |
| 2026-02-06 12:00 |
20:25:31.62 |
-23:29:40.1 |
HIP 100633 |
16.55 |
| 2026-02-07 00:00 |
20:26:03.36 |
-23:27:29.8 |
HIP 100718 |
20.63 |
| 2026-02-07 12:00 |
20:26:35.04 |
-23:25:19.4 |
HIP 100718 |
24.32 |
| 2026-02-08 00:00 |
20:27:06.67 |
-23:23:09.0 |
HIP 100958 |
26.47 |
| 2026-02-08 12:00 |
20:27:38.25 |
-23:20:58.5 |
HIP 100958 |
21.31 |
| 2026-02-09 00:00 |
20:28:09.77 |
-23:18:47.9 |
HIP 100958 |
17.94 |
| 2026-02-09 12:00 |
20:28:41.23 |
-23:16:37.2 |
HIP 100958 |
17.43 |
| 2026-02-10 00:00 |
20:29:12.64 |
-23:14:26.5 |
HIP 100958 |
19.99 |
| 2026-02-10 12:00 |
20:29:43.99 |
-23:12:15.7 |
HIP 101100 |
21.60 |
| 2026-02-11 00:00 |
20:30:15.28 |
-23:10:04.9 |
HIP 101100 |
21.21 |
| 2026-02-11 12:00 |
20:30:46.52 |
-23:07:54.0 |
HIP 101100 |
23.37 |
| 2026-02-12 00:00 |
20:31:17.69 |
-23:05:43.0 |
HIP 101100 |
27.47 |
| 2026-02-12 12:00 |
20:31:48.81 |
-23:03:32.0 |
HIP 101306 |
29.52 |
| 2026-02-13 00:00 |
20:32:19.86 |
-23:01:21.0 |
HIP 101500 |
28.26 |
| 2026-02-13 12:00 |
20:32:50.85 |
-22:59:10.0 |
HIP 101500 |
23.69 |
| 2026-02-14 00:00 |
20:33:21.79 |
-22:56:58.9 |
HIP 101500 |
20.85 |
| 2026-02-14 12:00 |
20:33:52.65 |
-22:54:47.7 |
HIP 101500 |
20.48 |
| 2026-02-15 00:00 |
20:34:23.46 |
-22:52:36.6 |
HIP 101500 |
22.67 |
| 2026-02-15 12:00 |
20:34:54.20 |
-22:50:25.4 |
HIP 101658 |
22.03 |
| 2026-02-16 00:00 |
20:35:24.87 |
-22:48:14.2 |
HIP 101658 |
14.65 |
| 2026-02-16 12:00 |
20:35:55.48 |
-22:46:03.0 |
HIP 101658 |
7.32 |
| 2026-02-17 00:00 |
20:36:26.02 |
-22:43:51.9 |
HIP 101658 |
1.31 |
| 2026-02-17 12:00 |
20:36:56.49 |
-22:41:40.7 |
HIP 101658 |
7.64 |
| 2026-02-18 00:00 |
20:37:26.90 |
-22:39:29.5 |
HIP 101785 |
13.47 |
| 2026-02-18 12:00 |
20:37:57.24 |
-22:37:18.3 |
HIP 101785 |
11.19 |
| 2026-02-19 00:00 |
20:38:27.50 |
-22:35:07.1 |
HIP 101785 |
13.29 |
| 2026-02-19 12:00 |
20:38:57.70 |
-22:32:56.0 |
HIP 101942 |
8.09 |
| 2026-02-20 00:00 |
20:39:27.83 |
-22:30:44.8 |
HIP 101942 |
1.11 |
| 2026-02-20 12:00 |
20:39:57.88 |
-22:28:33.7 |
HIP 101942 |
6.57 |
| 2026-02-21 00:00 |
20:40:27.86 |
-22:26:22.7 |
HIP 101942 |
13.80 |
| 2026-02-21 12:00 |
20:40:57.77 |
-22:24:11.6 |
HIP 102119 |
11.32 |
| 2026-02-22 00:00 |
20:41:27.60 |
-22:22:00.7 |
HIP 102119 |
4.29 |
| 2026-02-22 12:00 |
20:41:57.36 |
-22:19:49.7 |
HIP 102119 |
3.64 |
| 2026-02-23 00:00 |
20:42:27.04 |
-22:17:38.8 |
HIP 102119 |
10.58 |
| 2026-02-23 12:00 |
20:42:56.65 |
-22:15:28.0 |
HIP 102280 |
13.63 |
| 2026-02-24 00:00 |
20:43:26.18 |
-22:13:17.2 |
HIP 102280 |
13.95 |