| Parameter |
Value |
| Designation |
C/2001 K3 (Skiff) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-04-22T21:02:11.837760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:09Z |
| Obs used |
331 |
| NEO |
- |
| M1 |
12.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2001-07-19.0000000 |
| e |
0.99893567 |
| q (au) |
3.060125 |
| a (au) |
2875.163026 |
| i (deg) |
52.026577 |
| Ω (om, deg) |
289.850117 |
| ω (w, deg) |
3.452328 |
| M (ma, deg) |
0.000557 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.428 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.428 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.752 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
06:18:05.63 |
+43:33:31.0 |
HIP 29870 |
33.65 |
| 2026-07-29 12:00 |
06:18:08.69 |
+43:33:35.4 |
HIP 29870 |
33.86 |
| 2026-07-30 00:00 |
06:18:11.74 |
+43:33:39.9 |
HIP 29870 |
34.08 |
| 2026-07-30 12:00 |
06:18:14.77 |
+43:33:44.5 |
HIP 29870 |
34.30 |
| 2026-07-31 00:00 |
06:18:17.78 |
+43:33:49.1 |
HIP 29870 |
34.53 |
| 2026-07-31 12:00 |
06:18:20.78 |
+43:33:53.9 |
HIP 29870 |
34.78 |
| 2026-08-01 00:00 |
06:18:23.77 |
+43:33:58.8 |
HIP 29870 |
35.02 |
| 2026-08-01 12:00 |
06:18:26.73 |
+43:34:03.7 |
HIP 29870 |
35.28 |
| 2026-08-02 00:00 |
06:18:29.69 |
+43:34:08.8 |
HIP 29870 |
35.54 |
| 2026-08-02 12:00 |
06:18:32.62 |
+43:34:13.9 |
HIP 29870 |
35.81 |
| 2026-08-03 00:00 |
06:18:35.54 |
+43:34:19.1 |
HIP 29870 |
36.09 |
| 2026-08-03 12:00 |
06:18:38.44 |
+43:34:24.5 |
HIP 29870 |
36.37 |
| 2026-08-04 00:00 |
06:18:41.33 |
+43:34:29.9 |
HIP 29870 |
36.66 |
| 2026-08-04 12:00 |
06:18:44.20 |
+43:34:35.4 |
HIP 29870 |
36.95 |
| 2026-08-05 00:00 |
06:18:47.05 |
+43:34:41.0 |
HIP 29870 |
37.25 |
| 2026-08-05 12:00 |
06:18:49.88 |
+43:34:46.7 |
HIP 29870 |
37.55 |
| 2026-08-06 00:00 |
06:18:52.70 |
+43:34:52.4 |
HIP 29870 |
37.86 |
| 2026-08-06 12:00 |
06:18:55.50 |
+43:34:58.3 |
HIP 29870 |
38.17 |
| 2026-08-07 00:00 |
06:18:58.28 |
+43:35:04.3 |
HIP 29870 |
38.49 |
| 2026-08-07 12:00 |
06:19:01.04 |
+43:35:10.3 |
HIP 29870 |
38.81 |
| 2026-08-08 00:00 |
06:19:03.78 |
+43:35:16.4 |
HIP 29870 |
39.14 |
| 2026-08-08 12:00 |
06:19:06.51 |
+43:35:22.6 |
HIP 29870 |
39.47 |
| 2026-08-09 00:00 |
06:19:09.21 |
+43:35:28.9 |
HIP 29870 |
39.80 |
| 2026-08-09 12:00 |
06:19:11.90 |
+43:35:35.3 |
HIP 29870 |
40.13 |
| 2026-08-10 00:00 |
06:19:14.57 |
+43:35:41.8 |
HIP 29870 |
40.47 |
| 2026-08-10 12:00 |
06:19:17.22 |
+43:35:48.4 |
HIP 30267 |
40.54 |
| 2026-08-11 00:00 |
06:19:19.85 |
+43:35:55.0 |
HIP 30267 |
40.12 |
| 2026-08-11 12:00 |
06:19:22.45 |
+43:36:01.8 |
HIP 30267 |
39.70 |
| 2026-08-12 00:00 |
06:19:25.04 |
+43:36:08.6 |
HIP 30267 |
39.28 |
| 2026-08-12 12:00 |
06:19:27.61 |
+43:36:15.5 |
HIP 30267 |
38.87 |
| 2026-08-13 00:00 |
06:19:30.16 |
+43:36:22.5 |
HIP 30267 |
38.46 |
| 2026-08-13 12:00 |
06:19:32.69 |
+43:36:29.6 |
HIP 30267 |
38.06 |
| 2026-08-14 00:00 |
06:19:35.19 |
+43:36:36.7 |
HIP 30267 |
37.65 |
| 2026-08-14 12:00 |
06:19:37.68 |
+43:36:44.0 |
HIP 30267 |
37.26 |
| 2026-08-15 00:00 |
06:19:40.14 |
+43:36:51.3 |
HIP 30267 |
36.86 |
| 2026-08-15 12:00 |
06:19:42.59 |
+43:36:58.7 |
HIP 30267 |
36.47 |
| 2026-08-16 00:00 |
06:19:45.01 |
+43:37:06.2 |
HIP 30267 |
36.08 |
| 2026-08-16 12:00 |
06:19:47.41 |
+43:37:13.8 |
HIP 30267 |
35.69 |
| 2026-08-17 00:00 |
06:19:49.78 |
+43:37:21.4 |
HIP 30267 |
35.31 |
| 2026-08-17 12:00 |
06:19:52.14 |
+43:37:29.1 |
HIP 30267 |
34.93 |
| 2026-08-18 00:00 |
06:19:54.47 |
+43:37:36.9 |
HIP 30267 |
34.55 |
| 2026-08-18 12:00 |
06:19:56.78 |
+43:37:44.8 |
HIP 30267 |
34.18 |
| 2026-08-19 00:00 |
06:19:59.07 |
+43:37:52.8 |
HIP 30267 |
33.80 |