| 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) |
| 2026-05-12 00:00 |
21:37:04.60 |
-17:40:11.6 |
HIP 106805 |
30.24 |
| 2026-05-12 12:00 |
21:37:13.86 |
-17:39:10.8 |
HIP 106805 |
28.46 |
| 2026-05-13 00:00 |
21:37:22.94 |
-17:38:10.8 |
HIP 106805 |
26.81 |
| 2026-05-13 12:00 |
21:37:31.82 |
-17:37:11.7 |
HIP 106805 |
25.30 |
| 2026-05-14 00:00 |
21:37:40.51 |
-17:36:13.5 |
HIP 106805 |
23.95 |
| 2026-05-14 12:00 |
21:37:49.00 |
-17:35:16.2 |
HIP 106805 |
22.76 |
| 2026-05-15 00:00 |
21:37:57.30 |
-17:34:19.7 |
HIP 106805 |
21.75 |
| 2026-05-15 12:00 |
21:38:05.40 |
-17:33:24.1 |
HIP 106805 |
20.94 |
| 2026-05-16 00:00 |
21:38:13.31 |
-17:32:29.3 |
HIP 106805 |
20.32 |
| 2026-05-16 12:00 |
21:38:21.02 |
-17:31:35.5 |
HIP 106805 |
19.91 |
| 2026-05-17 00:00 |
21:38:28.53 |
-17:30:42.5 |
HIP 106805 |
19.69 |
| 2026-05-17 12:00 |
21:38:35.84 |
-17:29:50.4 |
HIP 106805 |
19.67 |
| 2026-05-18 00:00 |
21:38:42.95 |
-17:28:59.3 |
HIP 106805 |
19.83 |
| 2026-05-18 12:00 |
21:38:49.86 |
-17:28:09.0 |
HIP 106805 |
20.14 |
| 2026-05-19 00:00 |
21:38:56.57 |
-17:27:19.6 |
HIP 106805 |
20.60 |
| 2026-05-19 12:00 |
21:39:03.08 |
-17:26:31.1 |
HIP 106805 |
21.17 |
| 2026-05-20 00:00 |
21:39:09.38 |
-17:25:43.5 |
HIP 106805 |
21.84 |
| 2026-05-20 12:00 |
21:39:15.49 |
-17:24:56.8 |
HIP 107027 |
21.62 |
| 2026-05-21 00:00 |
21:39:21.39 |
-17:24:11.1 |
HIP 107027 |
20.84 |
| 2026-05-21 12:00 |
21:39:27.08 |
-17:23:26.2 |
HIP 107027 |
20.20 |
| 2026-05-22 00:00 |
21:39:32.58 |
-17:22:42.3 |
HIP 107027 |
19.68 |
| 2026-05-22 12:00 |
21:39:37.86 |
-17:21:59.2 |
HIP 107027 |
19.28 |
| 2026-05-23 00:00 |
21:39:42.94 |
-17:21:17.1 |
HIP 107027 |
19.01 |
| 2026-05-23 12:00 |
21:39:47.82 |
-17:20:35.9 |
HIP 107027 |
18.85 |
| 2026-05-24 00:00 |
21:39:52.49 |
-17:19:55.6 |
HIP 107027 |
18.81 |
| 2026-05-24 12:00 |
21:39:56.95 |
-17:19:16.2 |
HIP 107027 |
18.86 |
| 2026-05-25 00:00 |
21:40:01.21 |
-17:18:37.8 |
HIP 107027 |
19.00 |
| 2026-05-25 12:00 |
21:40:05.26 |
-17:18:00.2 |
HIP 107027 |
19.21 |
| 2026-05-26 00:00 |
21:40:09.10 |
-17:17:23.6 |
HIP 107027 |
19.49 |
| 2026-05-26 12:00 |
21:40:12.73 |
-17:16:47.9 |
HIP 107027 |
19.83 |
| 2026-05-27 00:00 |
21:40:16.16 |
-17:16:13.2 |
HIP 107027 |
20.21 |
| 2026-05-27 12:00 |
21:40:19.37 |
-17:15:39.3 |
HIP 107027 |
20.62 |
| 2026-05-28 00:00 |
21:40:22.37 |
-17:15:06.4 |
HIP 107027 |
21.06 |
| 2026-05-28 12:00 |
21:40:25.17 |
-17:14:34.4 |
HIP 107027 |
21.52 |
| 2026-05-29 00:00 |
21:40:27.75 |
-17:14:03.4 |
HIP 107122 |
21.64 |
| 2026-05-29 12:00 |
21:40:30.12 |
-17:13:33.3 |
HIP 107122 |
21.06 |
| 2026-05-30 00:00 |
21:40:32.28 |
-17:13:04.1 |
HIP 107122 |
20.55 |
| 2026-05-30 12:00 |
21:40:34.23 |
-17:12:35.8 |
HIP 107122 |
20.10 |
| 2026-05-31 00:00 |
21:40:35.97 |
-17:12:08.5 |
HIP 107122 |
19.70 |
| 2026-05-31 12:00 |
21:40:37.49 |
-17:11:42.1 |
HIP 107122 |
19.37 |
| 2026-06-01 00:00 |
21:40:38.80 |
-17:11:16.6 |
HIP 107122 |
19.10 |
| 2026-06-01 12:00 |
21:40:39.90 |
-17:10:52.1 |
HIP 107122 |
18.89 |
| 2026-06-02 00:00 |
21:40:40.78 |
-17:10:28.5 |
HIP 107122 |
18.74 |