188P/LINEAR-Mueller
| Parameter |
Value |
| Designation |
188P/LINEAR-Mueller |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-12-17T16:38:13.102080Z |
| Orbit solution date (soln_date, UTC) |
2026-01-07T20:31:02Z |
| Obs used |
1254 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-12-28.0000000 |
| e |
0.41644641 |
| q (au) |
2.554650 |
| a (au) |
4.377746 |
| i (deg) |
10.537916 |
| Ω (om, deg) |
359.122069 |
| ω (w, deg) |
26.665185 |
| M (ma, deg) |
158.318417 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.842 + 3.206\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.842 |
| n |
3.206 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
23:29:41.63 |
-02:10:05.8 |
HIP 115945 |
22.92 |
| 2026-02-03 12:00 |
23:30:28.55 |
-02:03:51.1 |
HIP 115945 |
22.47 |
| 2026-02-04 00:00 |
23:31:15.54 |
-01:57:35.9 |
HIP 115945 |
28.95 |
| 2026-02-04 12:00 |
23:32:02.59 |
-01:51:20.3 |
HIP 116290 |
33.99 |
| 2026-02-05 00:00 |
23:32:49.70 |
-01:45:04.2 |
HIP 116359 |
31.22 |
| 2026-02-05 12:00 |
23:33:36.89 |
-01:38:47.6 |
HIP 116359 |
17.86 |
| 2026-02-06 00:00 |
23:34:24.13 |
-01:32:30.6 |
HIP 116359 |
4.49 |
| 2026-02-06 12:00 |
23:35:11.44 |
-01:26:13.1 |
HIP 116359 |
8.91 |
| 2026-02-07 00:00 |
23:35:58.82 |
-01:19:55.2 |
HIP 116359 |
22.32 |
| 2026-02-07 12:00 |
23:36:46.26 |
-01:13:36.9 |
HIP 116559 |
19.22 |
| 2026-02-08 00:00 |
23:37:33.76 |
-01:07:18.1 |
HIP 116629 |
15.21 |
| 2026-02-08 12:00 |
23:38:21.33 |
-01:00:58.9 |
HIP 116643 |
8.97 |
| 2026-02-09 00:00 |
23:39:08.96 |
-00:54:39.3 |
HIP 116643 |
13.51 |
| 2026-02-09 12:00 |
23:39:56.65 |
-00:48:19.2 |
HIP 116756 |
4.88 |
| 2026-02-10 00:00 |
23:40:44.40 |
-00:41:58.8 |
HIP 116756 |
15.09 |
| 2026-02-10 12:00 |
23:41:32.22 |
-00:35:37.9 |
HIP 116826 |
17.72 |
| 2026-02-11 00:00 |
23:42:20.10 |
-00:29:16.7 |
HIP 117018 |
19.72 |
| 2026-02-11 12:00 |
23:43:08.04 |
-00:22:55.0 |
HIP 117016 |
13.80 |
| 2026-02-12 00:00 |
23:43:56.04 |
-00:16:33.0 |
HIP 117016 |
11.97 |
| 2026-02-12 12:00 |
23:44:44.10 |
-00:10:10.6 |
HIP 117016 |
21.58 |
| 2026-02-13 00:00 |
23:45:32.22 |
-00:03:47.8 |
HIP 117215 |
20.73 |
| 2026-02-13 12:00 |
23:46:20.40 |
+00:02:35.3 |
HIP 117215 |
14.08 |
| 2026-02-14 00:00 |
23:47:08.64 |
+00:08:58.8 |
HIP 117215 |
18.41 |
| 2026-02-14 12:00 |
23:47:56.94 |
+00:15:22.7 |
HIP 117457 |
18.74 |
| 2026-02-15 00:00 |
23:48:45.30 |
+00:21:46.9 |
HIP 117457 |
5.49 |
| 2026-02-15 12:00 |
23:49:33.71 |
+00:28:11.5 |
HIP 117457 |
9.16 |
| 2026-02-16 00:00 |
23:50:22.18 |
+00:34:36.4 |
HIP 117457 |
22.66 |
| 2026-02-16 12:00 |
23:51:10.72 |
+00:41:01.6 |
HIP 117491 |
34.93 |
| 2026-02-17 00:00 |
23:51:59.30 |
+00:47:27.1 |
HIP 117832 |
30.53 |
| 2026-02-17 12:00 |
23:52:47.95 |
+00:53:52.9 |
HIP 117832 |
24.20 |
| 2026-02-18 00:00 |
23:53:36.65 |
+01:00:19.1 |
HIP 117832 |
24.85 |
| 2026-02-18 12:00 |
23:54:25.40 |
+01:06:45.5 |
HIP 117960 |
30.59 |
| 2026-02-19 00:00 |
23:55:14.21 |
+01:13:12.2 |
HIP 118035 |
19.73 |
| 2026-02-19 12:00 |
23:56:03.08 |
+01:19:39.2 |
HIP 118035 |
8.73 |
| 2026-02-20 00:00 |
23:56:52.00 |
+01:26:06.5 |
HIP 118035 |
12.05 |
| 2026-02-20 12:00 |
23:57:40.97 |
+01:32:34.1 |
HIP 118035 |
24.43 |
| 2026-02-21 00:00 |
23:58:29.99 |
+01:39:01.8 |
HIP 118030 |
33.88 |
| 2026-02-21 12:00 |
23:59:19.07 |
+01:45:29.9 |
HIP 1 |
41.45 |
| 2026-02-22 00:00 |
00:00:08.20 |
+01:51:58.2 |
HIP 223 |
42.76 |
| 2026-02-22 12:00 |
00:00:57.39 |
+01:58:26.7 |
HIP 223 |
28.98 |
| 2026-02-23 00:00 |
00:01:46.62 |
+02:04:55.4 |
HIP 223 |
15.39 |
| 2026-02-23 12:00 |
00:02:35.91 |
+02:11:24.4 |
HIP 223 |
4.55 |
| 2026-02-24 00:00 |
00:03:25.24 |
+02:17:53.5 |
HIP 223 |
13.86 |