| 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 |
0.996 |
| gb |
-0.503 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
21:20:15.83 |
-17:51:44.6 |
HIP 105143 |
33.77 |
| 2026-07-29 12:00 |
21:19:56.33 |
-17:52:32.4 |
HIP 105143 |
29.07 |
| 2026-07-30 00:00 |
21:19:36.77 |
-17:53:20.2 |
HIP 105143 |
24.36 |
| 2026-07-30 12:00 |
21:19:17.15 |
-17:54:08.0 |
HIP 105143 |
19.64 |
| 2026-07-31 00:00 |
21:18:57.47 |
-17:54:55.8 |
HIP 105143 |
14.91 |
| 2026-07-31 12:00 |
21:18:37.74 |
-17:55:43.4 |
HIP 105143 |
10.20 |
| 2026-08-01 00:00 |
21:18:17.96 |
-17:56:31.0 |
HIP 105143 |
5.56 |
| 2026-08-01 12:00 |
21:17:58.14 |
-17:57:18.6 |
HIP 105143 |
1.81 |
| 2026-08-02 00:00 |
21:17:38.26 |
-17:58:06.0 |
HIP 105143 |
4.63 |
| 2026-08-02 12:00 |
21:17:18.35 |
-17:58:53.3 |
HIP 105143 |
9.26 |
| 2026-08-03 00:00 |
21:16:58.40 |
-17:59:40.5 |
HIP 105143 |
14.01 |
| 2026-08-03 12:00 |
21:16:38.42 |
-18:00:27.6 |
HIP 105143 |
18.80 |
| 2026-08-04 00:00 |
21:16:18.41 |
-18:01:14.5 |
HIP 104915 |
17.29 |
| 2026-08-04 12:00 |
21:15:58.37 |
-18:02:01.2 |
HIP 104915 |
12.52 |
| 2026-08-05 00:00 |
21:15:38.30 |
-18:02:47.8 |
HIP 104915 |
7.81 |
| 2026-08-05 12:00 |
21:15:18.21 |
-18:03:34.2 |
HIP 104915 |
3.48 |
| 2026-08-06 00:00 |
21:14:58.11 |
-18:04:20.4 |
HIP 104915 |
3.16 |
| 2026-08-06 12:00 |
21:14:37.99 |
-18:05:06.4 |
HIP 104915 |
7.40 |
| 2026-08-07 00:00 |
21:14:17.86 |
-18:05:52.1 |
HIP 104863 |
12.03 |
| 2026-08-07 12:00 |
21:13:57.72 |
-18:06:37.6 |
HIP 104863 |
14.72 |
| 2026-08-08 00:00 |
21:13:37.57 |
-18:07:22.9 |
HIP 104863 |
18.32 |
| 2026-08-08 12:00 |
21:13:17.43 |
-18:08:07.9 |
HIP 104863 |
22.39 |
| 2026-08-09 00:00 |
21:12:57.29 |
-18:08:52.6 |
HIP 104863 |
26.72 |
| 2026-08-09 12:00 |
21:12:37.16 |
-18:09:37.0 |
HIP 104863 |
31.20 |
| 2026-08-10 00:00 |
21:12:17.03 |
-18:10:21.2 |
HIP 104540 |
26.59 |
| 2026-08-10 12:00 |
21:11:56.92 |
-18:11:05.0 |
HIP 104540 |
21.89 |
| 2026-08-11 00:00 |
21:11:36.83 |
-18:11:48.4 |
HIP 104540 |
17.27 |
| 2026-08-11 12:00 |
21:11:16.75 |
-18:12:31.6 |
HIP 104540 |
12.82 |
| 2026-08-12 00:00 |
21:10:56.70 |
-18:13:14.4 |
HIP 104540 |
8.76 |
| 2026-08-12 12:00 |
21:10:36.68 |
-18:13:56.8 |
HIP 104540 |
5.98 |
| 2026-08-13 00:00 |
21:10:16.69 |
-18:14:38.8 |
HIP 104540 |
6.40 |
| 2026-08-13 12:00 |
21:09:56.74 |
-18:15:20.5 |
HIP 104540 |
9.59 |
| 2026-08-14 00:00 |
21:09:36.82 |
-18:16:01.7 |
HIP 104540 |
13.74 |
| 2026-08-14 12:00 |
21:09:16.95 |
-18:16:42.5 |
HIP 104540 |
18.19 |
| 2026-08-15 00:00 |
21:08:57.12 |
-18:17:22.9 |
HIP 104540 |
22.75 |
| 2026-08-15 12:00 |
21:08:37.35 |
-18:18:02.9 |
HIP 104387 |
25.75 |
| 2026-08-16 00:00 |
21:08:17.62 |
-18:18:42.4 |
HIP 104387 |
26.07 |
| 2026-08-16 12:00 |
21:07:57.95 |
-18:19:21.4 |
HIP 104230 |
25.79 |
| 2026-08-17 00:00 |
21:07:38.35 |
-18:20:00.0 |
HIP 104230 |
23.34 |
| 2026-08-17 12:00 |
21:07:18.80 |
-18:20:38.0 |
HIP 104230 |
21.65 |
| 2026-08-18 00:00 |
21:06:59.32 |
-18:21:15.6 |
HIP 104230 |
20.90 |
| 2026-08-18 12:00 |
21:06:39.91 |
-18:21:52.7 |
HIP 104230 |
21.18 |
| 2026-08-19 00:00 |
21:06:20.57 |
-18:22:29.3 |
HIP 104230 |
22.43 |