10P/Tempel 2
Metadata
| Parameter | Value |
|---|---|
| Designation | 10P/Tempel 2 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2015-11-14T06:46:48.838080Z |
| Orbit solution date (soln_date, UTC) | 2026-05-28T12:49:36Z |
| Obs used | 5247 |
| NEO | - |
| M1 | 14.700 |
| K1 | 4.500 |
| PC | - |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2014-12-06.0000000 |
| e | 0.53722249 |
| q (au) | 1.417878 |
| a (au) | 3.063843 |
| i (deg) | 12.029022 |
| Ω (om, deg) | 117.806879 |
| ω (w, deg) | 195.542021 |
| M (ma, deg) | 296.910667 |
Magnitude
Scatter + Global Linear
$$ M_a = (13.659 + 5.622\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 13.659 |
| n | 5.622 |
| gf | 1.000 |
| gb | -0.877 |
| k | 0.800 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) | End (UTC) | a | b |
|---|---|---|---|
| 2023-12-15 | 2026-04-08 | +24.7082 | -5.796 |
| 2026-04-08 | 2026-03-01 | +8.3620 | -2.222 |
| 2026-03-01 | 2026-06-08 | -2.4062 | +1.105 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Finding Chart
Ephemeris
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 20:10:26.79 | -08:12:53.9 | HIP 99311 | 18.00 |
| 2026-06-01 12:00 | 20:11:22.15 | -08:13:49.2 | HIP 99558 | 15.55 |
| 2026-06-02 00:00 | 20:12:17.45 | -08:14:49.1 | HIP 99558 | 9.30 |
| 2026-06-02 12:00 | 20:13:12.72 | -08:15:53.6 | HIP 99558 | 17.58 |
| 2026-06-03 00:00 | 20:14:07.93 | -08:17:02.8 | HIP 99558 | 30.15 |
| 2026-06-03 12:00 | 20:15:03.09 | -08:18:16.9 | HIP 99829 | 37.34 |
| 2026-06-04 00:00 | 20:15:58.20 | -08:19:35.8 | HIP 100054 | 33.22 |
| 2026-06-04 12:00 | 20:16:53.26 | -08:20:59.8 | HIP 100054 | 23.16 |
| 2026-06-05 00:00 | 20:17:48.26 | -08:22:28.8 | HIP 100054 | 18.63 |
| 2026-06-05 12:00 | 20:18:43.21 | -08:24:03.0 | HIP 100235 | 15.81 |
| 2026-06-06 00:00 | 20:19:38.10 | -08:25:42.5 | HIP 100235 | 2.42 |
| 2026-06-06 12:00 | 20:20:32.94 | -08:27:27.3 | HIP 100235 | 11.64 |
| 2026-06-07 00:00 | 20:21:27.71 | -08:29:17.6 | HIP 100235 | 25.27 |
| 2026-06-07 12:00 | 20:22:22.43 | -08:31:13.4 | HIP 100481 | 18.55 |
| 2026-06-08 00:00 | 20:23:17.08 | -08:33:14.8 | HIP 100481 | 19.31 |
| 2026-06-08 12:00 | 20:24:11.66 | -08:35:22.0 | HIP 100680 | 13.51 |
| 2026-06-09 00:00 | 20:25:06.18 | -08:37:34.9 | HIP 100680 | 10.12 |
| 2026-06-09 12:00 | 20:26:00.64 | -08:39:53.8 | HIP 100680 | 19.83 |
| 2026-06-10 00:00 | 20:26:55.02 | -08:42:18.7 | HIP 101024 | 29.22 |
| 2026-06-10 12:00 | 20:27:49.33 | -08:44:49.7 | HIP 101024 | 17.32 |
| 2026-06-11 00:00 | 20:28:43.57 | -08:47:26.9 | HIP 101024 | 11.00 |
| 2026-06-11 12:00 | 20:29:37.74 | -08:50:10.4 | HIP 101024 | 17.83 |
| 2026-06-12 00:00 | 20:30:31.83 | -08:53:00.2 | HIP 101024 | 29.84 |
| 2026-06-12 12:00 | 20:31:25.84 | -08:55:56.5 | HIP 101309 | 31.20 |
| 2026-06-13 00:00 | 20:32:19.77 | -08:58:59.4 | HIP 101379 | 23.97 |
| 2026-06-13 12:00 | 20:33:13.63 | -09:02:09.0 | HIP 101379 | 20.62 |
| 2026-06-14 00:00 | 20:34:07.40 | -09:05:25.3 | HIP 101580 | 17.13 |
| 2026-06-14 12:00 | 20:35:01.10 | -09:08:48.5 | HIP 101580 | 9.11 |
| 2026-06-15 00:00 | 20:35:54.71 | -09:12:18.5 | HIP 101580 | 15.80 |
| 2026-06-15 12:00 | 20:36:48.24 | -09:15:55.6 | HIP 101580 | 28.17 |
| 2026-06-16 00:00 | 20:37:41.69 | -09:19:39.8 | HIP 101664 | 36.70 |
| 2026-06-16 12:00 | 20:38:35.05 | -09:23:31.1 | HIP 102072 | 40.49 |
| 2026-06-17 00:00 | 20:39:28.34 | -09:27:29.7 | HIP 102072 | 26.84 |
| 2026-06-17 12:00 | 20:40:21.54 | -09:31:35.6 | HIP 102072 | 13.32 |
| 2026-06-18 00:00 | 20:41:14.65 | -09:35:48.9 | HIP 102072 | 3.37 |
| 2026-06-18 12:00 | 20:42:07.68 | -09:40:09.7 | HIP 102072 | 14.95 |
| 2026-06-19 00:00 | 20:43:00.63 | -09:44:38.1 | HIP 102072 | 28.55 |
| 2026-06-19 12:00 | 20:43:53.50 | -09:49:14.0 | HIP 102455 | 32.05 |
| 2026-06-20 00:00 | 20:44:46.28 | -09:53:57.6 | HIP 102455 | 18.96 |
| 2026-06-20 12:00 | 20:45:38.97 | -09:58:49.0 | HIP 102455 | 8.52 |
| 2026-06-21 00:00 | 20:46:31.58 | -10:03:48.2 | HIP 102455 | 12.95 |
| 2026-06-21 12:00 | 20:47:24.10 | -10:08:55.3 | HIP 102607 | 6.56 |
| 2026-06-22 00:00 | 20:48:16.53 | -10:14:10.3 | HIP 102607 | 14.91 |