| 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 |
0.996 |
| 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) |
| 2026-06-01 00:00 |
22:48:50.74 |
+08:51:02.3 |
HIP 112659 |
18.53 |
| 2026-06-01 12:00 |
22:49:36.10 |
+08:58:55.2 |
HIP 112654 |
23.23 |
| 2026-06-02 00:00 |
22:50:21.45 |
+09:06:49.3 |
HIP 112897 |
21.93 |
| 2026-06-02 12:00 |
22:51:06.80 |
+09:14:44.6 |
HIP 112897 |
17.78 |
| 2026-06-03 00:00 |
22:51:52.15 |
+09:22:41.1 |
HIP 112897 |
22.99 |
| 2026-06-03 12:00 |
22:52:37.50 |
+09:30:38.8 |
HIP 112935 |
19.78 |
| 2026-06-04 00:00 |
22:53:22.84 |
+09:38:37.6 |
HIP 112935 |
18.56 |
| 2026-06-04 12:00 |
22:54:08.19 |
+09:46:37.6 |
HIP 113180 |
23.95 |
| 2026-06-05 00:00 |
22:54:53.53 |
+09:54:38.9 |
HIP 113251 |
17.82 |
| 2026-06-05 12:00 |
22:55:38.87 |
+10:02:41.2 |
HIP 113251 |
4.85 |
| 2026-06-06 00:00 |
22:56:24.20 |
+10:10:44.8 |
HIP 113251 |
10.41 |
| 2026-06-06 12:00 |
22:57:09.54 |
+10:18:49.5 |
HIP 113251 |
23.93 |
| 2026-06-07 00:00 |
22:57:54.87 |
+10:26:55.4 |
HIP 113480 |
19.30 |
| 2026-06-07 12:00 |
22:58:40.20 |
+10:35:02.5 |
HIP 113480 |
5.68 |
| 2026-06-08 00:00 |
22:59:25.53 |
+10:43:10.7 |
HIP 113480 |
8.50 |
| 2026-06-08 12:00 |
23:00:10.86 |
+10:51:20.0 |
HIP 113480 |
22.20 |
| 2026-06-09 00:00 |
23:00:56.18 |
+10:59:30.5 |
HIP 113480 |
35.99 |
| 2026-06-09 12:00 |
23:01:41.50 |
+11:07:42.2 |
HIP 113894 |
37.86 |
| 2026-06-10 00:00 |
23:02:26.82 |
+11:15:55.0 |
HIP 113894 |
34.62 |
| 2026-06-10 12:00 |
23:03:12.14 |
+11:24:08.9 |
HIP 113880 |
29.97 |
| 2026-06-11 00:00 |
23:03:57.45 |
+11:32:23.9 |
HIP 113880 |
20.77 |
| 2026-06-11 12:00 |
23:04:42.76 |
+11:40:40.0 |
HIP 113880 |
18.59 |
| 2026-06-12 00:00 |
23:05:28.06 |
+11:48:57.3 |
HIP 113880 |
25.35 |
| 2026-06-12 12:00 |
23:06:13.37 |
+11:57:15.6 |
HIP 114190 |
20.56 |
| 2026-06-13 00:00 |
23:06:58.67 |
+12:05:35.1 |
HIP 114190 |
18.73 |
| 2026-06-13 12:00 |
23:07:43.96 |
+12:13:55.6 |
HIP 114190 |
25.78 |
| 2026-06-14 00:00 |
23:08:29.26 |
+12:22:17.2 |
HIP 114215 |
20.70 |
| 2026-06-14 12:00 |
23:09:14.54 |
+12:30:39.9 |
HIP 114215 |
23.21 |
| 2026-06-15 00:00 |
23:09:59.83 |
+12:39:03.6 |
HIP 114393 |
16.09 |
| 2026-06-15 12:00 |
23:10:45.11 |
+12:47:28.4 |
HIP 114393 |
12.50 |
| 2026-06-16 00:00 |
23:11:30.39 |
+12:55:54.2 |
HIP 114393 |
20.94 |
| 2026-06-16 12:00 |
23:12:15.67 |
+13:04:21.1 |
HIP 114660 |
20.72 |
| 2026-06-17 00:00 |
23:13:00.94 |
+13:12:49.0 |
HIP 114660 |
9.36 |
| 2026-06-17 12:00 |
23:13:46.21 |
+13:21:18.0 |
HIP 114660 |
11.51 |
| 2026-06-18 00:00 |
23:14:31.48 |
+13:29:47.9 |
HIP 114751 |
13.70 |
| 2026-06-18 12:00 |
23:15:16.75 |
+13:38:18.9 |
HIP 114751 |
9.98 |
| 2026-06-19 00:00 |
23:16:02.02 |
+13:46:50.9 |
HIP 114751 |
19.96 |
| 2026-06-19 12:00 |
23:16:47.29 |
+13:55:24.0 |
HIP 114751 |
32.93 |
| 2026-06-20 00:00 |
23:17:32.56 |
+14:03:58.0 |
HIP 114988 |
37.85 |
| 2026-06-20 12:00 |
23:18:17.82 |
+14:12:33.0 |
HIP 115051 |
30.18 |
| 2026-06-21 00:00 |
23:19:03.09 |
+14:21:09.0 |
HIP 115051 |
25.34 |
| 2026-06-21 12:00 |
23:19:48.37 |
+14:29:46.1 |
HIP 115289 |
20.01 |
| 2026-06-22 00:00 |
23:20:33.64 |
+14:38:24.1 |
HIP 115289 |
20.39 |