11P/Tempel-Swift-LINEAR
| Parameter |
Value |
| Designation |
11P/Tempel-Swift-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-11-26T00:20:20.598720Z |
| Orbit solution date (soln_date, UTC) |
2023-10-10T12:58:29Z |
| Obs used |
1182 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
20.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-11-02.0000000 |
| e |
0.57742214 |
| q (au) |
1.389708 |
| a (au) |
3.288645 |
| i (deg) |
14.435582 |
| Ω (om, deg) |
238.987024 |
| ω (w, deg) |
167.767374 |
| M (ma, deg) |
295.544649 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.255 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.255 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.501 |
| 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 |
19:46:46.68 |
-12:22:15.8 |
HIP 97297 |
29.62 |
| 2026-02-03 12:00 |
19:47:32.99 |
-12:19:24.3 |
HIP 97484 |
18.85 |
| 2026-02-04 00:00 |
19:48:19.31 |
-12:16:31.5 |
HIP 97484 |
7.99 |
| 2026-02-04 12:00 |
19:49:05.65 |
-12:13:37.4 |
HIP 97484 |
6.71 |
| 2026-02-05 00:00 |
19:49:52.02 |
-12:10:42.0 |
HIP 97484 |
17.32 |
| 2026-02-05 12:00 |
19:50:38.40 |
-12:07:45.3 |
HIP 97722 |
22.84 |
| 2026-02-06 00:00 |
19:51:24.81 |
-12:04:47.4 |
HIP 97722 |
15.65 |
| 2026-02-06 12:00 |
19:52:11.23 |
-12:01:48.1 |
HIP 97722 |
15.60 |
| 2026-02-07 00:00 |
19:52:57.67 |
-11:58:47.5 |
HIP 97722 |
22.74 |
| 2026-02-07 12:00 |
19:53:44.13 |
-11:55:45.6 |
HIP 97955 |
27.97 |
| 2026-02-08 00:00 |
19:54:30.61 |
-11:52:42.4 |
HIP 97955 |
28.94 |
| 2026-02-08 12:00 |
19:55:17.11 |
-11:49:38.0 |
HIP 97955 |
34.22 |
| 2026-02-09 00:00 |
19:56:03.62 |
-11:46:32.2 |
HIP 97955 |
42.23 |
| 2026-02-09 12:00 |
19:56:50.15 |
-11:43:25.1 |
HIP 98398 |
40.11 |
| 2026-02-10 00:00 |
19:57:36.70 |
-11:40:16.7 |
HIP 98398 |
28.85 |
| 2026-02-10 12:00 |
19:58:23.26 |
-11:37:07.0 |
HIP 98398 |
18.29 |
| 2026-02-11 00:00 |
19:59:09.84 |
-11:33:56.0 |
HIP 98398 |
10.84 |
| 2026-02-11 12:00 |
19:59:56.43 |
-11:30:43.6 |
HIP 98398 |
13.46 |
| 2026-02-12 00:00 |
20:00:43.04 |
-11:27:30.0 |
HIP 98398 |
22.95 |
| 2026-02-12 12:00 |
20:01:29.66 |
-11:24:15.1 |
HIP 98554 |
27.22 |
| 2026-02-13 00:00 |
20:02:16.30 |
-11:20:58.8 |
HIP 98554 |
34.07 |
| 2026-02-13 12:00 |
20:03:02.95 |
-11:17:41.2 |
HIP 98910 |
35.14 |
| 2026-02-14 00:00 |
20:03:49.61 |
-11:14:22.4 |
HIP 98910 |
28.48 |
| 2026-02-14 12:00 |
20:04:36.28 |
-11:11:02.2 |
HIP 98910 |
25.93 |
| 2026-02-15 00:00 |
20:05:22.96 |
-11:07:40.7 |
HIP 98904 |
24.60 |
| 2026-02-15 12:00 |
20:06:09.66 |
-11:04:17.9 |
HIP 98904 |
26.39 |
| 2026-02-16 00:00 |
20:06:56.36 |
-11:00:53.7 |
HIP 98904 |
32.76 |
| 2026-02-16 12:00 |
20:07:43.08 |
-10:57:28.3 |
HIP 99218 |
40.36 |
| 2026-02-17 00:00 |
20:08:29.80 |
-10:54:01.6 |
HIP 99218 |
35.24 |
| 2026-02-17 12:00 |
20:09:16.53 |
-10:50:33.5 |
HIP 99366 |
33.31 |
| 2026-02-18 00:00 |
20:10:03.28 |
-10:47:04.2 |
HIP 99543 |
30.31 |
| 2026-02-18 12:00 |
20:10:50.02 |
-10:43:33.5 |
HIP 99543 |
18.56 |
| 2026-02-19 00:00 |
20:11:36.78 |
-10:40:01.5 |
HIP 99543 |
7.65 |
| 2026-02-19 12:00 |
20:12:23.55 |
-10:36:28.2 |
HIP 99543 |
7.85 |
| 2026-02-20 00:00 |
20:13:10.32 |
-10:32:53.6 |
HIP 99597 |
18.57 |
| 2026-02-20 12:00 |
20:13:57.09 |
-10:29:17.7 |
HIP 99790 |
27.22 |
| 2026-02-21 00:00 |
20:14:43.87 |
-10:25:40.5 |
HIP 99790 |
27.76 |
| 2026-02-21 12:00 |
20:15:30.66 |
-10:22:02.0 |
HIP 99790 |
33.05 |
| 2026-02-22 00:00 |
20:16:17.45 |
-10:18:22.2 |
HIP 100065 |
31.34 |
| 2026-02-22 12:00 |
20:17:04.25 |
-10:14:41.1 |
HIP 100065 |
25.66 |
| 2026-02-23 00:00 |
20:17:51.05 |
-10:10:58.6 |
HIP 100138 |
22.70 |
| 2026-02-23 12:00 |
20:18:37.86 |
-10:07:14.9 |
HIP 100138 |
14.34 |
| 2026-02-24 00:00 |
20:19:24.66 |
-10:03:29.9 |
HIP 100138 |
13.74 |