| 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 |
0.996 |
| gb |
-0.545 |
| k |
0.800 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
15:46:25.08 |
-12:19:34.6 |
HIP 77337 |
14.84 |
| 2026-03-26 12:00 |
15:46:20.64 |
-12:17:56.2 |
HIP 77337 |
15.26 |
| 2026-03-27 00:00 |
15:46:15.95 |
-12:16:17.1 |
HIP 77337 |
15.96 |
| 2026-03-27 12:00 |
15:46:10.99 |
-12:14:37.3 |
HIP 77337 |
16.94 |
| 2026-03-28 00:00 |
15:46:05.78 |
-12:12:56.7 |
HIP 77337 |
18.16 |
| 2026-03-28 12:00 |
15:46:00.32 |
-12:11:15.5 |
HIP 77337 |
19.60 |
| 2026-03-29 00:00 |
15:45:54.60 |
-12:09:33.5 |
HIP 77337 |
21.22 |
| 2026-03-29 12:00 |
15:45:48.64 |
-12:07:50.9 |
HIP 77337 |
23.00 |
| 2026-03-30 00:00 |
15:45:42.42 |
-12:06:07.6 |
HIP 77071 |
22.70 |
| 2026-03-30 12:00 |
15:45:35.95 |
-12:04:23.6 |
HIP 77071 |
20.63 |
| 2026-03-31 00:00 |
15:45:29.23 |
-12:02:39.0 |
HIP 77071 |
18.55 |
| 2026-03-31 12:00 |
15:45:22.26 |
-12:00:53.8 |
HIP 77071 |
16.50 |
| 2026-04-01 00:00 |
15:45:15.05 |
-11:59:07.9 |
HIP 77071 |
14.51 |
| 2026-04-01 12:00 |
15:45:07.59 |
-11:57:21.4 |
HIP 77071 |
12.64 |
| 2026-04-02 00:00 |
15:44:59.89 |
-11:55:34.3 |
HIP 77071 |
10.98 |
| 2026-04-02 12:00 |
15:44:51.94 |
-11:53:46.5 |
HIP 77071 |
9.70 |
| 2026-04-03 00:00 |
15:44:43.75 |
-11:51:58.2 |
HIP 77071 |
8.99 |
| 2026-04-03 12:00 |
15:44:35.32 |
-11:50:09.3 |
HIP 77071 |
9.03 |
| 2026-04-04 00:00 |
15:44:26.65 |
-11:48:19.9 |
HIP 77071 |
9.87 |
| 2026-04-04 12:00 |
15:44:17.75 |
-11:46:29.8 |
HIP 77071 |
11.36 |
| 2026-04-05 00:00 |
15:44:08.60 |
-11:44:39.3 |
HIP 77071 |
13.31 |
| 2026-04-05 12:00 |
15:43:59.23 |
-11:42:48.2 |
HIP 77071 |
15.59 |
| 2026-04-06 00:00 |
15:43:49.61 |
-11:40:56.6 |
HIP 77071 |
18.09 |
| 2026-04-06 12:00 |
15:43:39.77 |
-11:39:04.4 |
HIP 77071 |
20.76 |
| 2026-04-07 00:00 |
15:43:29.70 |
-11:37:11.8 |
HIP 77071 |
23.55 |
| 2026-04-07 12:00 |
15:43:19.39 |
-11:35:18.7 |
HIP 76887 |
25.92 |
| 2026-04-08 00:00 |
15:43:08.86 |
-11:33:25.1 |
HIP 76887 |
22.74 |
| 2026-04-08 12:00 |
15:42:58.11 |
-11:31:31.1 |
HIP 76887 |
19.51 |
| 2026-04-09 00:00 |
15:42:47.13 |
-11:29:36.6 |
HIP 76887 |
16.24 |
| 2026-04-09 12:00 |
15:42:35.93 |
-11:27:41.7 |
HIP 76887 |
12.95 |
| 2026-04-10 00:00 |
15:42:24.51 |
-11:25:46.3 |
HIP 76887 |
9.66 |
| 2026-04-10 12:00 |
15:42:12.87 |
-11:23:50.6 |
HIP 76887 |
6.43 |
| 2026-04-11 00:00 |
15:42:01.02 |
-11:21:54.5 |
HIP 76887 |
3.63 |
| 2026-04-11 12:00 |
15:41:48.96 |
-11:19:58.0 |
HIP 76887 |
3.09 |
| 2026-04-12 00:00 |
15:41:36.68 |
-11:18:01.1 |
HIP 76887 |
5.62 |
| 2026-04-12 12:00 |
15:41:24.19 |
-11:16:03.9 |
HIP 76887 |
8.96 |
| 2026-04-13 00:00 |
15:41:11.50 |
-11:14:06.3 |
HIP 76887 |
12.51 |
| 2026-04-13 12:00 |
15:40:58.61 |
-11:12:08.5 |
HIP 76888 |
15.49 |
| 2026-04-14 00:00 |
15:40:45.51 |
-11:10:10.4 |
HIP 76774 |
17.45 |
| 2026-04-14 12:00 |
15:40:32.21 |
-11:08:11.9 |
HIP 76774 |
15.16 |
| 2026-04-15 00:00 |
15:40:18.72 |
-11:06:13.2 |
HIP 76774 |
13.58 |
| 2026-04-15 12:00 |
15:40:05.03 |
-11:04:14.3 |
HIP 76774 |
13.01 |
| 2026-04-16 00:00 |
15:39:51.15 |
-11:02:15.1 |
HIP 76774 |
13.61 |