| Parameter |
Value |
| Designation |
456P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-04T09:54:13.236480Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:18Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
15.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2012-08-18T12:00:39.830400Z |
| Discovery magnitude (MPC) |
23.40 r |
| Discovery observatory (MPC) |
T14 · Canada-France-Hawaii Telescope, Maunakea |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-07-18.0000000 |
| e |
0.11870899 |
| q (au) |
2.789385 |
| a (au) |
3.165113 |
| i (deg) |
16.961610 |
| Ω (om, deg) |
243.224773 |
| ω (w, deg) |
234.671332 |
| M (ma, deg) |
119.475406 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.598 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.598 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
13:48:57.50 |
-16:45:04.1 |
HIP 67403 |
13.83 |
| 2026-09-20 12:00 |
13:49:39.03 |
-16:47:21.0 |
HIP 67514 |
15.33 |
| 2026-09-21 00:00 |
13:50:20.62 |
-16:49:38.0 |
HIP 67514 |
12.76 |
| 2026-09-21 12:00 |
13:51:02.26 |
-16:51:55.1 |
HIP 67514 |
17.29 |
| 2026-09-22 00:00 |
13:51:43.94 |
-16:54:12.4 |
HIP 67514 |
25.39 |
| 2026-09-22 12:00 |
13:52:25.68 |
-16:56:29.8 |
HIP 67896 |
31.14 |
| 2026-09-23 00:00 |
13:53:07.47 |
-16:58:47.3 |
HIP 67896 |
21.37 |
| 2026-09-23 12:00 |
13:53:49.30 |
-17:01:05.0 |
HIP 67896 |
12.38 |
| 2026-09-24 00:00 |
13:54:31.18 |
-17:03:22.7 |
HIP 67896 |
7.79 |
| 2026-09-24 12:00 |
13:55:13.12 |
-17:05:40.6 |
HIP 67896 |
13.38 |
| 2026-09-25 00:00 |
13:55:55.09 |
-17:07:58.5 |
HIP 67896 |
22.56 |
| 2026-09-25 12:00 |
13:56:37.12 |
-17:10:16.5 |
HIP 67896 |
32.42 |
| 2026-09-26 00:00 |
13:57:19.20 |
-17:12:34.6 |
HIP 68268 |
30.29 |
| 2026-09-26 12:00 |
13:58:01.32 |
-17:14:52.8 |
HIP 68268 |
23.82 |
| 2026-09-27 00:00 |
13:58:43.48 |
-17:17:11.0 |
HIP 68268 |
20.73 |
| 2026-09-27 12:00 |
13:59:25.70 |
-17:19:29.3 |
HIP 68307 |
19.57 |
| 2026-09-28 00:00 |
14:00:07.96 |
-17:21:47.6 |
HIP 68307 |
23.32 |
| 2026-09-28 12:00 |
14:00:50.26 |
-17:24:06.0 |
HIP 68307 |
30.31 |
| 2026-09-29 00:00 |
14:01:32.61 |
-17:26:24.4 |
HIP 68643 |
22.28 |
| 2026-09-29 12:00 |
14:02:15.01 |
-17:28:42.8 |
HIP 68643 |
13.50 |
| 2026-09-30 00:00 |
14:02:57.45 |
-17:31:01.2 |
HIP 68643 |
9.14 |
| 2026-09-30 12:00 |
14:03:39.94 |
-17:33:19.7 |
HIP 68643 |
14.16 |
| 2026-10-01 00:00 |
14:04:22.47 |
-17:35:38.1 |
HIP 68643 |
23.11 |
| 2026-10-01 12:00 |
14:05:05.04 |
-17:37:56.6 |
HIP 68881 |
16.88 |
| 2026-10-02 00:00 |
14:05:47.66 |
-17:40:15.0 |
HIP 68881 |
6.48 |
| 2026-10-02 12:00 |
14:06:30.33 |
-17:42:33.4 |
HIP 68881 |
3.97 |
| 2026-10-03 00:00 |
14:07:13.03 |
-17:44:51.8 |
HIP 68881 |
14.39 |
| 2026-10-03 12:00 |
14:07:55.78 |
-17:47:10.2 |
HIP 69111 |
13.38 |
| 2026-10-04 00:00 |
14:08:38.58 |
-17:49:28.6 |
HIP 69111 |
6.02 |
| 2026-10-04 12:00 |
14:09:21.41 |
-17:51:46.9 |
HIP 69111 |
10.57 |
| 2026-10-05 00:00 |
14:10:04.29 |
-17:54:05.1 |
HIP 69247 |
8.83 |
| 2026-10-05 12:00 |
14:10:47.21 |
-17:56:23.3 |
HIP 69247 |
4.43 |
| 2026-10-06 00:00 |
14:11:30.18 |
-17:58:41.4 |
HIP 69362 |
7.86 |
| 2026-10-06 12:00 |
14:12:13.18 |
-18:00:59.4 |
HIP 69362 |
9.28 |
| 2026-10-07 00:00 |
14:12:56.23 |
-18:03:17.4 |
HIP 69362 |
18.18 |
| 2026-10-07 12:00 |
14:13:39.31 |
-18:05:35.3 |
HIP 69608 |
25.72 |
| 2026-10-08 00:00 |
14:14:22.44 |
-18:07:53.1 |
HIP 69658 |
15.23 |
| 2026-10-08 12:00 |
14:15:05.60 |
-18:10:10.7 |
HIP 69658 |
4.77 |
| 2026-10-09 00:00 |
14:15:48.81 |
-18:12:28.3 |
HIP 69658 |
5.88 |
| 2026-10-09 12:00 |
14:16:32.05 |
-18:14:45.7 |
HIP 69658 |
16.36 |
| 2026-10-10 00:00 |
14:17:15.33 |
-18:17:03.0 |
HIP 69792 |
18.30 |
| 2026-10-10 12:00 |
14:17:58.65 |
-18:19:20.2 |
HIP 69792 |
20.47 |
| 2026-10-11 00:00 |
14:18:42.00 |
-18:21:37.2 |
HIP 69998 |
14.28 |