10P/Tempel 2
| Parameter |
Value |
| Designation |
10P/Tempel 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-11-14T21:35:31.323840Z |
| Orbit solution date (soln_date, UTC) |
2026-01-08T08:16:31Z |
| Obs used |
4621 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
5.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-07-25.0000000 |
| e |
0.53649712 |
| q (au) |
1.420484 |
| a (au) |
3.064672 |
| i (deg) |
12.027887 |
| Ω (om, deg) |
117.804224 |
| ω (w, deg) |
195.533051 |
| M (ma, deg) |
205.152615 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.124 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.124 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.822 |
| k |
0.997 |
| 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) |
| 2026-02-03 00:00 |
16:23:00.90 |
-10:30:50.5 |
HIP 80159 |
27.16 |
| 2026-02-03 12:00 |
16:23:57.66 |
-10:32:09.2 |
HIP 80340 |
29.31 |
| 2026-02-04 00:00 |
16:24:54.46 |
-10:33:26.5 |
HIP 80477 |
30.37 |
| 2026-02-04 12:00 |
16:25:51.30 |
-10:34:42.3 |
HIP 80477 |
29.83 |
| 2026-02-05 00:00 |
16:26:48.19 |
-10:35:56.8 |
HIP 80608 |
29.32 |
| 2026-02-05 12:00 |
16:27:45.12 |
-10:37:09.8 |
HIP 80724 |
23.87 |
| 2026-02-06 00:00 |
16:28:42.09 |
-10:38:21.4 |
HIP 80724 |
18.49 |
| 2026-02-06 12:00 |
16:29:39.10 |
-10:39:31.5 |
HIP 80831 |
17.37 |
| 2026-02-07 00:00 |
16:30:36.15 |
-10:40:40.3 |
HIP 80869 |
7.76 |
| 2026-02-07 12:00 |
16:31:33.24 |
-10:41:47.5 |
HIP 80869 |
12.73 |
| 2026-02-08 00:00 |
16:32:30.37 |
-10:42:53.4 |
HIP 81027 |
11.06 |
| 2026-02-08 12:00 |
16:33:27.54 |
-10:43:57.8 |
HIP 81129 |
10.32 |
| 2026-02-09 00:00 |
16:34:24.75 |
-10:45:00.8 |
HIP 81129 |
6.09 |
| 2026-02-09 12:00 |
16:35:21.99 |
-10:46:02.3 |
HIP 81129 |
19.10 |
| 2026-02-10 00:00 |
16:36:19.28 |
-10:47:02.3 |
HIP 81377 |
17.94 |
| 2026-02-10 12:00 |
16:37:16.59 |
-10:48:00.9 |
HIP 81377 |
14.09 |
| 2026-02-11 00:00 |
16:38:13.95 |
-10:48:58.0 |
HIP 81377 |
21.76 |
| 2026-02-11 12:00 |
16:39:11.34 |
-10:49:53.7 |
HIP 81500 |
24.19 |
| 2026-02-12 00:00 |
16:40:08.77 |
-10:50:47.9 |
HIP 81500 |
31.36 |
| 2026-02-12 12:00 |
16:41:06.23 |
-10:51:40.6 |
HIP 81812 |
28.85 |
| 2026-02-13 00:00 |
16:42:03.72 |
-10:52:31.9 |
HIP 81812 |
19.56 |
| 2026-02-13 12:00 |
16:43:01.25 |
-10:53:21.6 |
HIP 81812 |
18.25 |
| 2026-02-14 00:00 |
16:43:58.81 |
-10:54:09.9 |
HIP 82047 |
23.82 |
| 2026-02-14 12:00 |
16:44:56.40 |
-10:54:56.8 |
HIP 82047 |
9.66 |
| 2026-02-15 00:00 |
16:45:54.02 |
-10:55:42.1 |
HIP 82047 |
4.50 |
| 2026-02-15 12:00 |
16:46:51.67 |
-10:56:26.0 |
HIP 82047 |
18.68 |
| 2026-02-16 00:00 |
16:47:49.36 |
-10:57:08.4 |
HIP 82197 |
26.12 |
| 2026-02-16 12:00 |
16:48:47.07 |
-10:57:49.3 |
HIP 82369 |
18.88 |
| 2026-02-17 00:00 |
16:49:44.81 |
-10:58:28.8 |
HIP 82369 |
11.58 |
| 2026-02-17 12:00 |
16:50:42.58 |
-10:59:06.7 |
HIP 82369 |
17.73 |
| 2026-02-18 00:00 |
16:51:40.38 |
-10:59:43.2 |
HIP 82409 |
26.01 |
| 2026-02-18 12:00 |
16:52:38.20 |
-11:00:18.2 |
HIP 82642 |
20.39 |
| 2026-02-19 00:00 |
16:53:36.05 |
-11:00:51.7 |
HIP 82642 |
15.67 |
| 2026-02-19 12:00 |
16:54:33.93 |
-11:01:23.8 |
HIP 82794 |
19.41 |
| 2026-02-20 00:00 |
16:55:31.83 |
-11:01:54.4 |
HIP 82794 |
17.09 |
| 2026-02-20 12:00 |
16:56:29.76 |
-11:02:23.5 |
HIP 82921 |
6.43 |
| 2026-02-21 00:00 |
16:57:27.71 |
-11:02:51.1 |
HIP 82979 |
5.08 |
| 2026-02-21 12:00 |
16:58:25.69 |
-11:03:17.2 |
HIP 82979 |
15.65 |
| 2026-02-22 00:00 |
16:59:23.69 |
-11:03:41.9 |
HIP 83233 |
17.60 |
| 2026-02-22 12:00 |
17:00:21.72 |
-11:04:05.1 |
HIP 83233 |
3.37 |
| 2026-02-23 00:00 |
17:01:19.77 |
-11:04:26.9 |
HIP 83233 |
10.90 |
| 2026-02-23 12:00 |
17:02:17.85 |
-11:04:47.2 |
HIP 83372 |
7.74 |
| 2026-02-24 00:00 |
17:03:15.94 |
-11:05:06.0 |
HIP 83372 |
15.32 |