| Parameter |
Value |
| Designation |
P/2025 D3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-07-25T15:47:32.513280Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:39Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
17.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-02-22T10:22:18.192000Z |
| Discovery magnitude (MPC) |
21.65 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-02-24.0000000 |
| e |
0.25244615 |
| q (au) |
2.965357 |
| a (au) |
3.966747 |
| i (deg) |
9.644276 |
| Ω (om, deg) |
186.635562 |
| ω (w, deg) |
294.451918 |
| M (ma, deg) |
26.615137 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.470 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.470 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.545 |
| 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) |
| 2026-09-20 00:00 |
15:33:44.79 |
-11:30:45.7 |
HIP 76258 |
23.98 |
| 2026-09-20 12:00 |
15:34:09.14 |
-11:32:34.8 |
HIP 76258 |
19.69 |
| 2026-09-21 00:00 |
15:34:33.60 |
-11:34:23.9 |
HIP 76322 |
13.71 |
| 2026-09-21 12:00 |
15:34:58.16 |
-11:36:12.9 |
HIP 76322 |
7.66 |
| 2026-09-22 00:00 |
15:35:22.83 |
-11:38:01.8 |
HIP 76322 |
2.90 |
| 2026-09-22 12:00 |
15:35:47.60 |
-11:39:50.7 |
HIP 76322 |
6.16 |
| 2026-09-23 00:00 |
15:36:12.48 |
-11:41:39.5 |
HIP 76322 |
12.18 |
| 2026-09-23 12:00 |
15:36:37.45 |
-11:43:28.2 |
HIP 76420 |
16.43 |
| 2026-09-24 00:00 |
15:37:02.54 |
-11:45:16.8 |
HIP 76420 |
16.75 |
| 2026-09-24 12:00 |
15:37:27.72 |
-11:47:05.3 |
HIP 76420 |
19.34 |
| 2026-09-25 00:00 |
15:37:53.00 |
-11:48:53.8 |
HIP 76420 |
23.46 |
| 2026-09-25 12:00 |
15:38:18.39 |
-11:50:42.1 |
HIP 76420 |
28.49 |
| 2026-09-26 00:00 |
15:38:43.87 |
-11:52:30.3 |
HIP 76717 |
26.50 |
| 2026-09-26 12:00 |
15:39:09.45 |
-11:54:18.4 |
HIP 76717 |
21.19 |
| 2026-09-27 00:00 |
15:39:35.13 |
-11:56:06.4 |
HIP 76717 |
16.75 |
| 2026-09-27 12:00 |
15:40:00.90 |
-11:57:54.2 |
HIP 76717 |
14.05 |
| 2026-09-28 00:00 |
15:40:26.77 |
-11:59:41.9 |
HIP 76828 |
13.01 |
| 2026-09-28 12:00 |
15:40:52.74 |
-12:01:29.5 |
HIP 76828 |
10.27 |
| 2026-09-29 00:00 |
15:41:18.80 |
-12:03:16.9 |
HIP 76828 |
11.35 |
| 2026-09-29 12:00 |
15:41:44.96 |
-12:05:04.2 |
HIP 76828 |
15.50 |
| 2026-09-30 00:00 |
15:42:11.21 |
-12:06:51.3 |
HIP 76828 |
20.98 |
| 2026-09-30 12:00 |
15:42:37.55 |
-12:08:38.3 |
HIP 76979 |
21.96 |
| 2026-10-01 00:00 |
15:43:03.99 |
-12:10:25.1 |
HIP 76979 |
19.14 |
| 2026-10-01 12:00 |
15:43:30.52 |
-12:12:11.7 |
HIP 77071 |
18.14 |
| 2026-10-02 00:00 |
15:43:57.14 |
-12:13:58.2 |
HIP 77071 |
16.77 |
| 2026-10-02 12:00 |
15:44:23.85 |
-12:15:44.5 |
HIP 77071 |
18.00 |
| 2026-10-03 00:00 |
15:44:50.64 |
-12:17:30.5 |
HIP 77071 |
21.41 |
| 2026-10-03 12:00 |
15:45:17.53 |
-12:19:16.5 |
HIP 77071 |
26.18 |
| 2026-10-04 00:00 |
15:45:44.51 |
-12:21:02.2 |
HIP 77337 |
24.61 |
| 2026-10-04 12:00 |
15:46:11.58 |
-12:22:47.7 |
HIP 77337 |
19.26 |
| 2026-10-05 00:00 |
15:46:38.73 |
-12:24:33.0 |
HIP 77337 |
15.14 |
| 2026-10-05 12:00 |
15:47:05.97 |
-12:26:18.0 |
HIP 77337 |
13.47 |
| 2026-10-06 00:00 |
15:47:33.30 |
-12:28:02.9 |
HIP 77392 |
14.72 |
| 2026-10-06 12:00 |
15:48:00.71 |
-12:29:47.6 |
HIP 77392 |
12.05 |
| 2026-10-07 00:00 |
15:48:28.20 |
-12:31:32.0 |
HIP 77392 |
13.03 |
| 2026-10-07 12:00 |
15:48:55.78 |
-12:33:16.1 |
HIP 77392 |
17.06 |
| 2026-10-08 00:00 |
15:49:23.45 |
-12:35:00.1 |
HIP 77392 |
22.58 |
| 2026-10-08 12:00 |
15:49:51.19 |
-12:36:43.8 |
HIP 77666 |
21.76 |
| 2026-10-09 00:00 |
15:50:19.02 |
-12:38:27.2 |
HIP 77666 |
15.00 |
| 2026-10-09 12:00 |
15:50:46.93 |
-12:40:10.4 |
HIP 77666 |
8.64 |
| 2026-10-10 00:00 |
15:51:14.92 |
-12:41:53.3 |
HIP 77666 |
4.75 |
| 2026-10-10 12:00 |
15:51:42.99 |
-12:43:35.9 |
HIP 77666 |
8.36 |
| 2026-10-11 00:00 |
15:52:11.13 |
-12:45:18.3 |
HIP 77708 |
13.50 |