| Parameter |
Value |
| Designation |
10P/Tempel 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-11-14T15:45:19.828800Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T13:31:20Z |
| Obs used |
4768 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-11-30.0000000 |
| e |
0.53668086 |
| q (au) |
1.419824 |
| a (au) |
3.064462 |
| i (deg) |
12.028587 |
| Ω (om, deg) |
117.806019 |
| ω (w, deg) |
195.524994 |
| M (ma, deg) |
228.698406 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.872 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.872 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-0.786 |
| k |
0.988 |
| 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) |
| 2026-03-26 00:00 |
18:01:52.13 |
-10:40:54.0 |
HIP 88335 |
35.04 |
| 2026-03-26 12:00 |
18:02:50.91 |
-10:39:50.3 |
HIP 88502 |
26.50 |
| 2026-03-27 00:00 |
18:03:49.69 |
-10:38:45.4 |
HIP 88502 |
17.58 |
| 2026-03-27 12:00 |
18:04:48.47 |
-10:37:39.5 |
HIP 88502 |
18.31 |
| 2026-03-28 00:00 |
18:05:47.24 |
-10:36:32.5 |
HIP 88608 |
24.97 |
| 2026-03-28 12:00 |
18:06:46.02 |
-10:35:24.4 |
HIP 88850 |
22.59 |
| 2026-03-29 00:00 |
18:07:44.79 |
-10:34:15.2 |
HIP 88850 |
8.12 |
| 2026-03-29 12:00 |
18:08:43.56 |
-10:33:05.0 |
HIP 88850 |
6.42 |
| 2026-03-30 00:00 |
18:09:42.32 |
-10:31:53.8 |
HIP 88963 |
17.58 |
| 2026-03-30 12:00 |
18:10:41.09 |
-10:30:41.6 |
HIP 88963 |
25.00 |
| 2026-03-31 00:00 |
18:11:39.85 |
-10:29:28.3 |
HIP 89218 |
18.14 |
| 2026-03-31 12:00 |
18:12:38.61 |
-10:28:14.1 |
HIP 89218 |
16.02 |
| 2026-04-01 00:00 |
18:13:37.36 |
-10:26:58.9 |
HIP 89377 |
17.70 |
| 2026-04-01 12:00 |
18:14:36.12 |
-10:25:42.7 |
HIP 89377 |
15.36 |
| 2026-04-02 00:00 |
18:15:34.87 |
-10:24:25.5 |
HIP 89589 |
19.84 |
| 2026-04-02 12:00 |
18:16:33.61 |
-10:23:07.4 |
HIP 89589 |
6.77 |
| 2026-04-03 00:00 |
18:17:32.35 |
-10:21:48.4 |
HIP 89589 |
10.90 |
| 2026-04-03 12:00 |
18:18:31.08 |
-10:20:28.5 |
HIP 89589 |
24.75 |
| 2026-04-04 00:00 |
18:19:29.81 |
-10:19:07.6 |
HIP 89874 |
15.23 |
| 2026-04-04 12:00 |
18:20:28.53 |
-10:17:45.9 |
HIP 89874 |
6.70 |
| 2026-04-05 00:00 |
18:21:27.25 |
-10:16:23.4 |
HIP 90050 |
16.02 |
| 2026-04-05 12:00 |
18:22:25.96 |
-10:15:00.0 |
HIP 90050 |
4.73 |
| 2026-04-06 00:00 |
18:23:24.66 |
-10:13:35.7 |
HIP 90083 |
5.57 |
| 2026-04-06 12:00 |
18:24:23.35 |
-10:12:10.6 |
HIP 90217 |
12.78 |
| 2026-04-07 00:00 |
18:25:22.03 |
-10:10:44.7 |
HIP 90217 |
19.11 |
| 2026-04-07 12:00 |
18:26:20.70 |
-10:09:18.0 |
HIP 90320 |
25.83 |
| 2026-04-08 00:00 |
18:27:19.36 |
-10:07:50.6 |
HIP 90565 |
22.48 |
| 2026-04-08 12:00 |
18:28:18.01 |
-10:06:22.5 |
HIP 90565 |
10.26 |
| 2026-04-09 00:00 |
18:29:16.65 |
-10:04:53.6 |
HIP 90565 |
11.24 |
| 2026-04-09 12:00 |
18:30:15.27 |
-10:03:24.0 |
HIP 90565 |
23.84 |
| 2026-04-10 00:00 |
18:31:13.89 |
-10:01:53.7 |
HIP 90565 |
37.83 |
| 2026-04-10 12:00 |
18:32:12.48 |
-10:00:22.8 |
HIP 90867 |
38.16 |
| 2026-04-11 00:00 |
18:33:11.06 |
-09:58:51.2 |
HIP 91134 |
34.16 |
| 2026-04-11 12:00 |
18:34:09.63 |
-09:57:19.0 |
HIP 91134 |
21.66 |
| 2026-04-12 00:00 |
18:35:08.18 |
-09:55:46.3 |
HIP 91134 |
13.87 |
| 2026-04-12 12:00 |
18:36:06.71 |
-09:54:12.9 |
HIP 91134 |
18.33 |
| 2026-04-13 00:00 |
18:37:05.22 |
-09:52:39.0 |
HIP 91134 |
30.00 |
| 2026-04-13 12:00 |
18:38:03.72 |
-09:51:04.6 |
HIP 91134 |
43.40 |
| 2026-04-14 00:00 |
18:39:02.19 |
-09:49:29.7 |
HIP 91557 |
42.63 |
| 2026-04-14 12:00 |
18:40:00.64 |
-09:47:54.4 |
HIP 91567 |
39.82 |
| 2026-04-15 00:00 |
18:40:59.08 |
-09:46:18.6 |
HIP 91788 |
32.31 |
| 2026-04-15 12:00 |
18:41:57.49 |
-09:44:42.4 |
HIP 91788 |
21.14 |
| 2026-04-16 00:00 |
18:42:55.88 |
-09:43:05.8 |
HIP 91788 |
16.40 |