| Parameter |
Value |
| Designation |
512P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-03-23T20:53:02.955840Z |
| Orbit solution date (soln_date, UTC) |
2026-09-15T13:42:29Z |
| Obs used |
103 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
14.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2012-10-10T08:37:45.206400Z |
| Discovery magnitude (MPC) |
21.10 T |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-12-20.0000000 |
| e |
0.15516656 |
| q (au) |
4.838023 |
| a (au) |
5.726600 |
| i (deg) |
12.552517 |
| Ω (om, deg) |
73.783539 |
| ω (w, deg) |
307.794262 |
| M (ma, deg) |
150.828733 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.865 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.865 |
| n |
6.000 |
| gf |
0.996 |
| gb |
-0.832 |
| k |
0.800 |
| δ90 |
9.998 |
| 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 |
01:34:58.66 |
-04:24:59.0 |
HIP 7347 |
11.08 |
| 2026-09-20 12:00 |
01:34:46.60 |
-04:26:22.7 |
HIP 7347 |
8.85 |
| 2026-09-21 00:00 |
01:34:34.41 |
-04:27:46.4 |
HIP 7347 |
7.46 |
| 2026-09-21 12:00 |
01:34:22.09 |
-04:29:09.9 |
HIP 7347 |
7.47 |
| 2026-09-22 00:00 |
01:34:09.64 |
-04:30:33.3 |
HIP 7347 |
8.90 |
| 2026-09-22 12:00 |
01:33:57.07 |
-04:31:56.5 |
HIP 7347 |
11.24 |
| 2026-09-23 00:00 |
01:33:44.37 |
-04:33:19.6 |
HIP 7347 |
14.06 |
| 2026-09-23 12:00 |
01:33:31.56 |
-04:34:42.5 |
HIP 7347 |
17.15 |
| 2026-09-24 00:00 |
01:33:18.62 |
-04:36:05.2 |
HIP 7347 |
20.39 |
| 2026-09-24 12:00 |
01:33:05.57 |
-04:37:27.7 |
HIP 7347 |
23.74 |
| 2026-09-25 00:00 |
01:32:52.40 |
-04:38:49.9 |
HIP 7124 |
24.73 |
| 2026-09-25 12:00 |
01:32:39.12 |
-04:40:11.9 |
HIP 7124 |
21.60 |
| 2026-09-26 00:00 |
01:32:25.73 |
-04:41:33.6 |
HIP 7124 |
18.61 |
| 2026-09-26 12:00 |
01:32:12.23 |
-04:42:55.0 |
HIP 7124 |
15.88 |
| 2026-09-27 00:00 |
01:31:58.63 |
-04:44:16.2 |
HIP 7124 |
13.57 |
| 2026-09-27 12:00 |
01:31:44.93 |
-04:45:36.9 |
HIP 7124 |
11.95 |
| 2026-09-28 00:00 |
01:31:31.12 |
-04:46:57.4 |
HIP 7124 |
11.35 |
| 2026-09-28 12:00 |
01:31:17.22 |
-04:48:17.5 |
HIP 7059 |
10.26 |
| 2026-09-29 00:00 |
01:31:03.22 |
-04:49:37.2 |
HIP 7059 |
8.01 |
| 2026-09-29 12:00 |
01:30:49.13 |
-04:50:56.5 |
HIP 7059 |
7.15 |
| 2026-09-30 00:00 |
01:30:34.94 |
-04:52:15.4 |
HIP 7059 |
8.16 |
| 2026-09-30 12:00 |
01:30:20.67 |
-04:53:33.8 |
HIP 7059 |
10.53 |
| 2026-10-01 00:00 |
01:30:06.31 |
-04:54:51.8 |
HIP 7059 |
13.58 |
| 2026-10-01 12:00 |
01:29:51.87 |
-04:56:09.3 |
HIP 7059 |
16.97 |
| 2026-10-02 00:00 |
01:29:37.35 |
-04:57:26.3 |
HIP 7059 |
20.52 |
| 2026-10-02 12:00 |
01:29:22.75 |
-04:58:42.8 |
HIP 7059 |
24.19 |
| 2026-10-03 00:00 |
01:29:08.07 |
-04:59:58.8 |
HIP 7059 |
27.92 |
| 2026-10-03 12:00 |
01:28:53.32 |
-05:01:14.2 |
HIP 7059 |
31.70 |
| 2026-10-04 00:00 |
01:28:38.50 |
-05:02:29.1 |
HIP 7059 |
35.52 |
| 2026-10-04 12:00 |
01:28:23.61 |
-05:03:43.4 |
HIP 6826 |
36.65 |
| 2026-10-05 00:00 |
01:28:08.66 |
-05:04:57.0 |
HIP 6712 |
36.66 |
| 2026-10-05 12:00 |
01:27:53.64 |
-05:06:10.1 |
HIP 6712 |
34.86 |
| 2026-10-06 00:00 |
01:27:38.57 |
-05:07:22.4 |
HIP 6712 |
33.41 |
| 2026-10-06 12:00 |
01:27:23.44 |
-05:08:34.1 |
HIP 6654 |
31.45 |
| 2026-10-07 00:00 |
01:27:08.26 |
-05:09:45.2 |
HIP 6654 |
28.09 |
| 2026-10-07 12:00 |
01:26:53.03 |
-05:10:55.5 |
HIP 6654 |
24.89 |
| 2026-10-08 00:00 |
01:26:37.75 |
-05:12:05.0 |
HIP 6654 |
21.92 |
| 2026-10-08 12:00 |
01:26:22.42 |
-05:13:13.9 |
HIP 6654 |
19.31 |
| 2026-10-09 00:00 |
01:26:07.06 |
-05:14:21.9 |
HIP 6654 |
17.22 |
| 2026-10-09 12:00 |
01:25:51.66 |
-05:15:29.2 |
HIP 6654 |
15.85 |
| 2026-10-10 00:00 |
01:25:36.22 |
-05:16:35.7 |
HIP 6654 |
15.42 |
| 2026-10-10 12:00 |
01:25:20.75 |
-05:17:41.3 |
HIP 6654 |
15.99 |
| 2026-10-11 00:00 |
01:25:05.25 |
-05:18:46.1 |
HIP 6654 |
17.47 |