| Parameter |
Value |
| Designation |
P/2012 T3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-04-27T22:19:16.250880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:23Z |
| Obs used |
34 |
| NEO |
- |
| M1 |
14.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-10-15.0000000 |
| e |
0.60453490 |
| q (au) |
2.383874 |
| a (au) |
6.028027 |
| i (deg) |
9.509712 |
| Ω (om, deg) |
114.259697 |
| ω (w, deg) |
196.802529 |
| M (ma, deg) |
11.325800 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.125 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.125 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.654 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
16:04:32.27 |
-09:08:47.7 |
HIP 78733 |
27.70 |
| 2026-05-12 12:00 |
16:04:13.47 |
-09:07:58.0 |
HIP 78633 |
26.43 |
| 2026-05-13 00:00 |
16:03:54.52 |
-09:07:09.1 |
HIP 78633 |
23.22 |
| 2026-05-13 12:00 |
16:03:35.42 |
-09:06:21.0 |
HIP 78633 |
20.61 |
| 2026-05-14 00:00 |
16:03:16.18 |
-09:05:33.8 |
HIP 78633 |
18.89 |
| 2026-05-14 12:00 |
16:02:56.80 |
-09:04:47.4 |
HIP 78633 |
18.32 |
| 2026-05-15 00:00 |
16:02:37.30 |
-09:04:01.8 |
HIP 78633 |
19.05 |
| 2026-05-15 12:00 |
16:02:17.67 |
-09:03:17.2 |
HIP 78633 |
20.94 |
| 2026-05-16 00:00 |
16:01:57.92 |
-09:02:33.5 |
HIP 78633 |
23.75 |
| 2026-05-16 12:00 |
16:01:38.05 |
-09:01:50.7 |
HIP 78633 |
27.21 |
| 2026-05-17 00:00 |
16:01:18.07 |
-09:01:08.9 |
HIP 78633 |
31.10 |
| 2026-05-17 12:00 |
16:00:57.99 |
-09:00:28.0 |
HIP 78298 |
29.50 |
| 2026-05-18 00:00 |
16:00:37.80 |
-08:59:48.1 |
HIP 78298 |
24.98 |
| 2026-05-18 12:00 |
16:00:17.53 |
-08:59:09.3 |
HIP 78298 |
20.68 |
| 2026-05-19 00:00 |
15:59:57.16 |
-08:58:31.5 |
HIP 78298 |
16.81 |
| 2026-05-19 12:00 |
15:59:36.71 |
-08:57:54.7 |
HIP 78298 |
13.75 |
| 2026-05-20 00:00 |
15:59:16.18 |
-08:57:19.0 |
HIP 78244 |
10.95 |
| 2026-05-20 12:00 |
15:58:55.58 |
-08:56:44.4 |
HIP 78244 |
6.48 |
| 2026-05-21 00:00 |
15:58:34.91 |
-08:56:10.9 |
HIP 78244 |
4.04 |
| 2026-05-21 12:00 |
15:58:14.18 |
-08:55:38.5 |
HIP 78244 |
6.59 |
| 2026-05-22 00:00 |
15:57:53.39 |
-08:55:07.2 |
HIP 78244 |
11.11 |
| 2026-05-22 12:00 |
15:57:32.56 |
-08:54:37.1 |
HIP 78081 |
13.78 |
| 2026-05-23 00:00 |
15:57:11.67 |
-08:54:08.2 |
HIP 78081 |
8.61 |
| 2026-05-23 12:00 |
15:56:50.75 |
-08:53:40.5 |
HIP 78081 |
3.44 |
| 2026-05-24 00:00 |
15:56:29.79 |
-08:53:13.9 |
HIP 78081 |
1.86 |
| 2026-05-24 12:00 |
15:56:08.80 |
-08:52:48.6 |
HIP 78081 |
7.01 |
| 2026-05-25 00:00 |
15:55:47.79 |
-08:52:24.5 |
HIP 78081 |
12.20 |
| 2026-05-25 12:00 |
15:55:26.76 |
-08:52:01.7 |
HIP 78003 |
13.72 |
| 2026-05-26 00:00 |
15:55:05.72 |
-08:51:40.1 |
HIP 78003 |
15.68 |
| 2026-05-26 12:00 |
15:54:44.67 |
-08:51:19.7 |
HIP 77883 |
17.61 |
| 2026-05-27 00:00 |
15:54:23.61 |
-08:51:00.7 |
HIP 77883 |
16.22 |
| 2026-05-27 12:00 |
15:54:02.56 |
-08:50:43.0 |
HIP 77883 |
16.46 |
| 2026-05-28 00:00 |
15:53:41.52 |
-08:50:26.6 |
HIP 77883 |
18.27 |
| 2026-05-28 12:00 |
15:53:20.49 |
-08:50:11.5 |
HIP 77883 |
21.25 |
| 2026-05-29 00:00 |
15:52:59.47 |
-08:49:57.8 |
HIP 77883 |
24.98 |
| 2026-05-29 12:00 |
15:52:38.48 |
-08:49:45.4 |
HIP 77883 |
29.17 |
| 2026-05-30 00:00 |
15:52:17.52 |
-08:49:34.4 |
HIP 77883 |
33.64 |
| 2026-05-30 12:00 |
15:51:56.60 |
-08:49:24.7 |
HIP 77747 |
35.88 |
| 2026-05-31 00:00 |
15:51:35.71 |
-08:49:16.5 |
HIP 77747 |
37.49 |
| 2026-05-31 12:00 |
15:51:14.87 |
-08:49:09.6 |
HIP 77747 |
39.68 |
| 2026-06-01 00:00 |
15:50:54.08 |
-08:49:04.2 |
HIP 77563 |
38.35 |
| 2026-06-01 12:00 |
15:50:33.35 |
-08:49:00.2 |
HIP 77563 |
37.21 |
| 2026-06-02 00:00 |
15:50:12.67 |
-08:48:57.7 |
HIP 77563 |
36.73 |