| 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) |
| 2026-06-01 00:00 |
06:11:24.70 |
+43:36:21.9 |
HIP 29378 |
11.66 |
| 2026-06-01 12:00 |
06:11:28.06 |
+43:36:14.7 |
HIP 29378 |
11.73 |
| 2026-06-02 00:00 |
06:11:31.42 |
+43:36:07.5 |
HIP 29378 |
11.83 |
| 2026-06-02 12:00 |
06:11:34.79 |
+43:36:00.4 |
HIP 29378 |
11.96 |
| 2026-06-03 00:00 |
06:11:38.18 |
+43:35:53.4 |
HIP 29378 |
12.11 |
| 2026-06-03 12:00 |
06:11:41.57 |
+43:35:46.5 |
HIP 29378 |
12.30 |
| 2026-06-04 00:00 |
06:11:44.97 |
+43:35:39.7 |
HIP 29378 |
12.51 |
| 2026-06-04 12:00 |
06:11:48.39 |
+43:35:33.0 |
HIP 29378 |
12.75 |
| 2026-06-05 00:00 |
06:11:51.81 |
+43:35:26.5 |
HIP 29378 |
13.01 |
| 2026-06-05 12:00 |
06:11:55.24 |
+43:35:20.0 |
HIP 29378 |
13.30 |
| 2026-06-06 00:00 |
06:11:58.67 |
+43:35:13.6 |
HIP 29378 |
13.60 |
| 2026-06-06 12:00 |
06:12:02.12 |
+43:35:07.2 |
HIP 29378 |
13.93 |
| 2026-06-07 00:00 |
06:12:05.57 |
+43:35:01.0 |
HIP 29378 |
14.28 |
| 2026-06-07 12:00 |
06:12:09.04 |
+43:34:54.9 |
HIP 29378 |
14.65 |
| 2026-06-08 00:00 |
06:12:12.51 |
+43:34:48.9 |
HIP 29378 |
15.03 |
| 2026-06-08 12:00 |
06:12:15.98 |
+43:34:43.0 |
HIP 29378 |
15.43 |
| 2026-06-09 00:00 |
06:12:19.47 |
+43:34:37.2 |
HIP 29378 |
15.85 |
| 2026-06-09 12:00 |
06:12:22.96 |
+43:34:31.5 |
HIP 29378 |
16.28 |
| 2026-06-10 00:00 |
06:12:26.46 |
+43:34:25.9 |
HIP 29378 |
16.72 |
| 2026-06-10 12:00 |
06:12:29.96 |
+43:34:20.4 |
HIP 29378 |
17.17 |
| 2026-06-11 00:00 |
06:12:33.48 |
+43:34:15.0 |
HIP 29378 |
17.64 |
| 2026-06-11 12:00 |
06:12:36.99 |
+43:34:09.7 |
HIP 29378 |
18.11 |
| 2026-06-12 00:00 |
06:12:40.52 |
+43:34:04.4 |
HIP 29378 |
18.59 |
| 2026-06-12 12:00 |
06:12:44.05 |
+43:33:59.3 |
HIP 29378 |
19.09 |
| 2026-06-13 00:00 |
06:12:47.58 |
+43:33:54.3 |
HIP 29378 |
19.59 |
| 2026-06-13 12:00 |
06:12:51.12 |
+43:33:49.4 |
HIP 29378 |
20.10 |
| 2026-06-14 00:00 |
06:12:54.67 |
+43:33:44.6 |
HIP 29378 |
20.61 |
| 2026-06-14 12:00 |
06:12:58.22 |
+43:33:39.9 |
HIP 29378 |
21.14 |
| 2026-06-15 00:00 |
06:13:01.77 |
+43:33:35.3 |
HIP 29378 |
21.66 |
| 2026-06-15 12:00 |
06:13:05.33 |
+43:33:30.8 |
HIP 29378 |
22.20 |
| 2026-06-16 00:00 |
06:13:08.89 |
+43:33:26.4 |
HIP 29378 |
22.74 |
| 2026-06-16 12:00 |
06:13:12.46 |
+43:33:22.1 |
HIP 29378 |
23.28 |
| 2026-06-17 00:00 |
06:13:16.03 |
+43:33:17.9 |
HIP 29378 |
23.83 |
| 2026-06-17 12:00 |
06:13:19.60 |
+43:33:13.8 |
HIP 29378 |
24.39 |
| 2026-06-18 00:00 |
06:13:23.18 |
+43:33:09.8 |
HIP 29378 |
24.95 |
| 2026-06-18 12:00 |
06:13:26.76 |
+43:33:05.9 |
HIP 29378 |
25.51 |
| 2026-06-19 00:00 |
06:13:30.34 |
+43:33:02.2 |
HIP 29378 |
26.07 |
| 2026-06-19 12:00 |
06:13:33.92 |
+43:32:58.5 |
HIP 29378 |
26.64 |
| 2026-06-20 00:00 |
06:13:37.51 |
+43:32:54.9 |
HIP 29378 |
27.21 |
| 2026-06-20 12:00 |
06:13:41.09 |
+43:32:51.4 |
HIP 29378 |
27.79 |
| 2026-06-21 00:00 |
06:13:44.68 |
+43:32:48.1 |
HIP 29378 |
28.36 |
| 2026-06-21 12:00 |
06:13:48.27 |
+43:32:44.8 |
HIP 29378 |
28.94 |
| 2026-06-22 00:00 |
06:13:51.87 |
+43:32:41.6 |
HIP 29378 |
29.53 |