76P/West-Kohoutek-Ikemura
| Parameter |
Value |
| Designation |
76P/West-Kohoutek-Ikemura |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-05-08T00:32:14.444160Z |
| Orbit solution date (soln_date, UTC) |
2025-12-01T14:11:46Z |
| Obs used |
1158 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
9.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-03-21.0000000 |
| e |
0.53842984 |
| q (au) |
1.602071 |
| a (au) |
3.470914 |
| i (deg) |
30.475488 |
| Ω (om, deg) |
84.112848 |
| ω (w, deg) |
0.048347 |
| M (ma, deg) |
241.262434 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.029 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.029 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.999 |
| 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 |
01:26:11.68 |
-09:17:46.7 |
HIP 6797 |
18.90 |
| 2026-02-03 12:00 |
01:27:02.82 |
-09:03:52.5 |
HIP 6797 |
15.30 |
| 2026-02-04 00:00 |
01:27:54.17 |
-08:49:58.2 |
HIP 6740 |
22.14 |
| 2026-02-04 12:00 |
01:28:45.72 |
-08:36:03.9 |
HIP 6964 |
17.28 |
| 2026-02-05 00:00 |
01:29:37.48 |
-08:22:09.6 |
HIP 7038 |
24.54 |
| 2026-02-05 12:00 |
01:30:29.44 |
-08:08:15.4 |
HIP 7038 |
5.60 |
| 2026-02-06 00:00 |
01:31:21.60 |
-07:54:21.2 |
HIP 7038 |
13.37 |
| 2026-02-06 12:00 |
01:32:13.97 |
-07:40:27.1 |
HIP 7209 |
30.05 |
| 2026-02-07 00:00 |
01:33:06.55 |
-07:26:33.1 |
HIP 7350 |
24.94 |
| 2026-02-07 12:00 |
01:33:59.33 |
-07:12:39.2 |
HIP 7276 |
11.88 |
| 2026-02-08 00:00 |
01:34:52.31 |
-06:58:45.4 |
HIP 7276 |
17.48 |
| 2026-02-08 12:00 |
01:35:45.49 |
-06:44:51.8 |
HIP 7464 |
21.32 |
| 2026-02-09 00:00 |
01:36:38.88 |
-06:30:58.3 |
HIP 7464 |
9.93 |
| 2026-02-09 12:00 |
01:37:32.46 |
-06:17:05.1 |
HIP 7464 |
21.97 |
| 2026-02-10 00:00 |
01:38:26.25 |
-06:03:12.0 |
HIP 7669 |
19.64 |
| 2026-02-10 12:00 |
01:39:20.25 |
-05:49:19.2 |
HIP 7669 |
10.23 |
| 2026-02-11 00:00 |
01:40:14.44 |
-05:35:26.6 |
HIP 7852 |
15.75 |
| 2026-02-11 12:00 |
01:41:08.83 |
-05:21:34.2 |
HIP 7852 |
3.63 |
| 2026-02-12 00:00 |
01:42:03.43 |
-05:07:42.2 |
HIP 7942 |
11.03 |
| 2026-02-12 12:00 |
01:42:58.22 |
-04:53:50.5 |
HIP 7942 |
13.94 |
| 2026-02-13 00:00 |
01:43:53.22 |
-04:39:59.0 |
HIP 8094 |
5.96 |
| 2026-02-13 12:00 |
01:44:48.41 |
-04:26:08.0 |
HIP 8227 |
21.28 |
| 2026-02-14 00:00 |
01:45:43.81 |
-04:12:17.3 |
HIP 8227 |
3.75 |
| 2026-02-14 12:00 |
01:46:39.40 |
-03:58:27.0 |
HIP 8227 |
18.47 |
| 2026-02-15 00:00 |
01:47:35.20 |
-03:44:37.1 |
HIP 8349 |
30.38 |
| 2026-02-15 12:00 |
01:48:31.19 |
-03:30:47.7 |
HIP 8349 |
20.89 |
| 2026-02-16 00:00 |
01:49:27.38 |
-03:16:58.7 |
HIP 8349 |
26.94 |
| 2026-02-16 12:00 |
01:50:23.77 |
-03:03:10.2 |
HIP 8720 |
30.53 |
| 2026-02-17 00:00 |
01:51:20.36 |
-02:49:22.2 |
HIP 8661 |
11.80 |
| 2026-02-17 12:00 |
01:52:17.15 |
-02:35:34.7 |
HIP 8661 |
10.54 |
| 2026-02-18 00:00 |
01:53:14.13 |
-02:21:47.8 |
HIP 8661 |
29.46 |
| 2026-02-18 12:00 |
01:54:11.31 |
-02:08:01.4 |
HIP 8661 |
49.12 |
| 2026-02-19 00:00 |
01:55:08.69 |
-01:54:15.6 |
HIP 9098 |
32.80 |
| 2026-02-19 12:00 |
01:56:06.27 |
-01:40:30.5 |
HIP 9098 |
16.58 |
| 2026-02-20 00:00 |
01:57:04.04 |
-01:26:46.0 |
HIP 9098 |
16.30 |
| 2026-02-20 12:00 |
01:58:02.01 |
-01:13:02.1 |
HIP 9098 |
32.42 |
| 2026-02-21 00:00 |
01:59:00.17 |
-00:59:19.0 |
HIP 9395 |
27.43 |
| 2026-02-21 12:00 |
01:59:58.53 |
-00:45:36.5 |
HIP 9444 |
22.01 |
| 2026-02-22 00:00 |
02:00:57.08 |
-00:31:54.8 |
HIP 9444 |
22.03 |
| 2026-02-22 12:00 |
02:01:55.83 |
-00:18:13.8 |
HIP 9631 |
28.16 |
| 2026-02-23 00:00 |
02:02:54.77 |
-00:04:33.7 |
HIP 9625 |
12.30 |
| 2026-02-23 12:00 |
02:03:53.90 |
+00:09:05.7 |
HIP 9589 |
10.66 |
| 2026-02-24 00:00 |
02:04:53.23 |
+00:22:44.3 |
HIP 9742 |
7.30 |