| Parameter |
Value |
| Designation |
512P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-03-26T20:06:03.300480Z |
| Orbit solution date (soln_date, UTC) |
2026-03-12T02:52:39Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
7.300 |
| 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) |
2018-04-16.0000000 |
| e |
0.15528156 |
| q (au) |
4.838682 |
| a (au) |
5.728160 |
| i (deg) |
12.552486 |
| Ω (om, deg) |
73.777821 |
| ω (w, deg) |
308.074423 |
| M (ma, deg) |
132.724572 |
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) |
| 2026-06-01 00:00 |
01:09:25.08 |
-04:13:24.4 |
HIP 5281 |
28.09 |
| 2026-06-01 12:00 |
01:09:47.30 |
-04:11:40.5 |
HIP 5281 |
33.62 |
| 2026-06-02 00:00 |
01:10:09.43 |
-04:09:57.4 |
HIP 5620 |
35.65 |
| 2026-06-02 12:00 |
01:10:31.48 |
-04:08:15.2 |
HIP 5620 |
32.30 |
| 2026-06-03 00:00 |
01:10:53.44 |
-04:06:33.9 |
HIP 5620 |
29.70 |
| 2026-06-03 12:00 |
01:11:15.32 |
-04:04:53.4 |
HIP 5620 |
28.03 |
| 2026-06-04 00:00 |
01:11:37.11 |
-04:03:13.9 |
HIP 5620 |
27.47 |
| 2026-06-04 12:00 |
01:11:58.82 |
-04:01:35.2 |
HIP 5620 |
28.06 |
| 2026-06-05 00:00 |
01:12:20.44 |
-03:59:57.3 |
HIP 5620 |
29.71 |
| 2026-06-05 12:00 |
01:12:41.98 |
-03:58:20.4 |
HIP 5620 |
32.25 |
| 2026-06-06 00:00 |
01:13:03.42 |
-03:56:44.4 |
HIP 5845 |
30.85 |
| 2026-06-06 12:00 |
01:13:24.78 |
-03:55:09.2 |
HIP 5845 |
25.30 |
| 2026-06-07 00:00 |
01:13:46.05 |
-03:53:35.0 |
HIP 5845 |
19.77 |
| 2026-06-07 12:00 |
01:14:07.23 |
-03:52:01.6 |
HIP 5845 |
14.28 |
| 2026-06-08 00:00 |
01:14:28.31 |
-03:50:29.2 |
HIP 5845 |
8.83 |
| 2026-06-08 12:00 |
01:14:49.30 |
-03:48:57.7 |
HIP 5845 |
3.52 |
| 2026-06-09 00:00 |
01:15:10.20 |
-03:47:27.0 |
HIP 5845 |
2.47 |
| 2026-06-09 12:00 |
01:15:31.01 |
-03:45:57.4 |
HIP 5845 |
7.64 |
| 2026-06-10 00:00 |
01:15:51.72 |
-03:44:28.6 |
HIP 5845 |
12.97 |
| 2026-06-10 12:00 |
01:16:12.34 |
-03:43:00.7 |
HIP 5845 |
18.31 |
| 2026-06-11 00:00 |
01:16:32.86 |
-03:41:33.8 |
HIP 5845 |
23.62 |
| 2026-06-11 12:00 |
01:16:53.28 |
-03:40:07.9 |
HIP 5845 |
28.91 |
| 2026-06-12 00:00 |
01:17:13.60 |
-03:38:42.8 |
HIP 5845 |
34.17 |
| 2026-06-12 12:00 |
01:17:33.82 |
-03:37:18.7 |
HIP 5845 |
39.40 |
| 2026-06-13 00:00 |
01:17:53.95 |
-03:35:55.6 |
HIP 6077 |
43.97 |
| 2026-06-13 12:00 |
01:18:13.97 |
-03:34:33.4 |
HIP 6283 |
40.26 |
| 2026-06-14 00:00 |
01:18:33.89 |
-03:33:12.2 |
HIP 6283 |
35.28 |
| 2026-06-14 12:00 |
01:18:53.71 |
-03:31:51.9 |
HIP 6283 |
30.40 |
| 2026-06-15 00:00 |
01:19:13.42 |
-03:30:32.6 |
HIP 6283 |
25.64 |
| 2026-06-15 12:00 |
01:19:33.03 |
-03:29:14.3 |
HIP 6283 |
21.07 |
| 2026-06-16 00:00 |
01:19:52.53 |
-03:27:57.0 |
HIP 6283 |
16.81 |
| 2026-06-16 12:00 |
01:20:11.93 |
-03:26:40.6 |
HIP 6283 |
13.13 |
| 2026-06-17 00:00 |
01:20:31.22 |
-03:25:25.2 |
HIP 6283 |
10.63 |
| 2026-06-17 12:00 |
01:20:50.40 |
-03:24:10.7 |
HIP 6283 |
10.16 |
| 2026-06-18 00:00 |
01:21:09.47 |
-03:22:57.3 |
HIP 6360 |
8.70 |
| 2026-06-18 12:00 |
01:21:28.44 |
-03:21:44.8 |
HIP 6360 |
5.57 |
| 2026-06-19 00:00 |
01:21:47.29 |
-03:20:33.3 |
HIP 6360 |
5.82 |
| 2026-06-19 12:00 |
01:22:06.03 |
-03:19:22.8 |
HIP 6360 |
9.12 |
| 2026-06-20 00:00 |
01:22:24.66 |
-03:18:13.3 |
HIP 6360 |
13.35 |
| 2026-06-20 12:00 |
01:22:43.17 |
-03:17:04.8 |
HIP 6360 |
17.83 |
| 2026-06-21 00:00 |
01:23:01.57 |
-03:15:57.3 |
HIP 6360 |
22.39 |
| 2026-06-21 12:00 |
01:23:19.86 |
-03:14:50.8 |
HIP 6360 |
26.98 |
| 2026-06-22 00:00 |
01:23:38.03 |
-03:13:45.2 |
HIP 6605 |
28.86 |