P/2012 T3 (PANSTARRS)
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
15:47:55.40 |
-10:56:58.3 |
HIP 77349 |
8.17 |
| 2026-02-03 12:00 |
15:48:20.90 |
-10:57:35.2 |
HIP 77349 |
14.29 |
| 2026-02-04 00:00 |
15:48:46.28 |
-10:58:11.2 |
HIP 77546 |
18.99 |
| 2026-02-04 12:00 |
15:49:11.53 |
-10:58:46.3 |
HIP 77546 |
12.95 |
| 2026-02-05 00:00 |
15:49:36.66 |
-10:59:20.5 |
HIP 77546 |
7.25 |
| 2026-02-05 12:00 |
15:50:01.66 |
-10:59:53.7 |
HIP 77546 |
3.78 |
| 2026-02-06 00:00 |
15:50:26.54 |
-11:00:26.0 |
HIP 77546 |
7.18 |
| 2026-02-06 12:00 |
15:50:51.28 |
-11:00:57.3 |
HIP 77546 |
12.78 |
| 2026-02-07 00:00 |
15:51:15.89 |
-11:01:27.7 |
HIP 77546 |
18.65 |
| 2026-02-07 12:00 |
15:51:40.36 |
-11:01:57.2 |
HIP 77737 |
15.76 |
| 2026-02-08 00:00 |
15:52:04.71 |
-11:02:25.8 |
HIP 77737 |
13.81 |
| 2026-02-08 12:00 |
15:52:28.91 |
-11:02:53.4 |
HIP 77737 |
14.29 |
| 2026-02-09 00:00 |
15:52:52.98 |
-11:03:20.1 |
HIP 77737 |
16.97 |
| 2026-02-09 12:00 |
15:53:16.91 |
-11:03:45.8 |
HIP 77878 |
14.04 |
| 2026-02-10 00:00 |
15:53:40.70 |
-11:04:10.7 |
HIP 77878 |
8.20 |
| 2026-02-10 12:00 |
15:54:04.35 |
-11:04:34.5 |
HIP 77878 |
2.45 |
| 2026-02-11 00:00 |
15:54:27.85 |
-11:04:57.5 |
HIP 77878 |
3.49 |
| 2026-02-11 12:00 |
15:54:51.20 |
-11:05:19.5 |
HIP 77878 |
9.19 |
| 2026-02-12 00:00 |
15:55:14.41 |
-11:05:40.6 |
HIP 77878 |
14.88 |
| 2026-02-12 12:00 |
15:55:37.47 |
-11:06:00.7 |
HIP 77878 |
20.55 |
| 2026-02-13 00:00 |
15:56:00.39 |
-11:06:19.9 |
HIP 78122 |
21.11 |
| 2026-02-13 12:00 |
15:56:23.14 |
-11:06:38.2 |
HIP 78122 |
17.30 |
| 2026-02-14 00:00 |
15:56:45.75 |
-11:06:55.5 |
HIP 78122 |
14.70 |
| 2026-02-14 12:00 |
15:57:08.20 |
-11:07:11.9 |
HIP 78122 |
13.92 |
| 2026-02-15 00:00 |
15:57:30.49 |
-11:07:27.4 |
HIP 78122 |
15.22 |
| 2026-02-15 12:00 |
15:57:52.63 |
-11:07:41.9 |
HIP 78122 |
18.12 |
| 2026-02-16 00:00 |
15:58:14.60 |
-11:07:55.5 |
HIP 78293 |
18.25 |
| 2026-02-16 12:00 |
15:58:36.41 |
-11:08:08.2 |
HIP 78293 |
14.59 |
| 2026-02-17 00:00 |
15:58:58.06 |
-11:08:19.9 |
HIP 78293 |
12.25 |
| 2026-02-17 12:00 |
15:59:19.55 |
-11:08:30.8 |
HIP 78293 |
11.97 |
| 2026-02-18 00:00 |
15:59:40.87 |
-11:08:40.7 |
HIP 78293 |
13.83 |
| 2026-02-18 12:00 |
16:00:02.02 |
-11:08:49.6 |
HIP 78293 |
17.11 |
| 2026-02-19 00:00 |
16:00:23.00 |
-11:08:57.7 |
HIP 78293 |
21.12 |
| 2026-02-19 12:00 |
16:00:43.81 |
-11:09:04.8 |
HIP 78534 |
20.60 |
| 2026-02-20 00:00 |
16:01:04.45 |
-11:09:11.0 |
HIP 78534 |
16.07 |
| 2026-02-20 12:00 |
16:01:24.91 |
-11:09:16.3 |
HIP 78534 |
12.01 |
| 2026-02-21 00:00 |
16:01:45.20 |
-11:09:20.7 |
HIP 78534 |
9.01 |
| 2026-02-21 12:00 |
16:02:05.32 |
-11:09:24.2 |
HIP 78534 |
8.23 |
| 2026-02-22 00:00 |
16:02:25.25 |
-11:09:26.8 |
HIP 78534 |
10.13 |
| 2026-02-22 12:00 |
16:02:45.01 |
-11:09:28.5 |
HIP 78534 |
13.59 |
| 2026-02-23 00:00 |
16:03:04.58 |
-11:09:29.2 |
HIP 78534 |
17.68 |
| 2026-02-23 12:00 |
16:03:23.97 |
-11:09:29.1 |
HIP 78534 |
22.02 |
| 2026-02-24 00:00 |
16:03:43.18 |
-11:09:28.1 |
HIP 78738 |
20.39 |