223P/Skiff
| Parameter |
Value |
| Designation |
223P/Skiff |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-08-14T12:28:20.533440Z |
| Orbit solution date (soln_date, UTC) |
2023-01-14T00:13:32Z |
| Obs used |
776 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-09-02.0000000 |
| e |
0.41643283 |
| q (au) |
2.420478 |
| a (au) |
4.147728 |
| i (deg) |
27.054381 |
| Ω (om, deg) |
346.824301 |
| ω (w, deg) |
37.861800 |
| M (ma, deg) |
44.743681 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.223 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.223 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.631 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:09:56.29 |
-44:08:13.5 |
HIP 94111 |
7.41 |
| 2026-02-03 12:00 |
19:10:42.68 |
-44:07:38.5 |
HIP 94111 |
15.01 |
| 2026-02-04 00:00 |
19:11:29.01 |
-44:07:03.5 |
HIP 94334 |
13.27 |
| 2026-02-04 12:00 |
19:12:15.29 |
-44:06:28.4 |
HIP 94334 |
11.18 |
| 2026-02-05 00:00 |
19:13:01.52 |
-44:05:53.3 |
HIP 94334 |
14.58 |
| 2026-02-05 12:00 |
19:13:47.70 |
-44:05:18.2 |
HIP 94334 |
20.95 |
| 2026-02-06 00:00 |
19:14:33.82 |
-44:04:43.0 |
HIP 94656 |
26.27 |
| 2026-02-06 12:00 |
19:15:19.89 |
-44:04:07.9 |
HIP 94656 |
24.31 |
| 2026-02-07 00:00 |
19:16:05.90 |
-44:03:32.7 |
HIP 94656 |
25.06 |
| 2026-02-07 12:00 |
19:16:51.85 |
-44:02:57.6 |
HIP 94906 |
25.21 |
| 2026-02-08 00:00 |
19:17:37.75 |
-44:02:22.5 |
HIP 94906 |
19.64 |
| 2026-02-08 12:00 |
19:18:23.59 |
-44:01:47.3 |
HIP 94906 |
16.50 |
| 2026-02-09 00:00 |
19:19:09.37 |
-44:01:12.2 |
HIP 94906 |
17.15 |
| 2026-02-09 12:00 |
19:19:55.09 |
-44:00:37.2 |
HIP 94906 |
21.25 |
| 2026-02-10 00:00 |
19:20:40.75 |
-44:00:02.1 |
HIP 95130 |
24.54 |
| 2026-02-10 12:00 |
19:21:26.35 |
-43:59:27.1 |
HIP 95130 |
23.22 |
| 2026-02-11 00:00 |
19:22:11.88 |
-43:58:52.1 |
HIP 95130 |
24.74 |
| 2026-02-11 12:00 |
19:22:57.35 |
-43:58:17.2 |
HIP 95396 |
21.30 |
| 2026-02-12 00:00 |
19:23:42.76 |
-43:57:42.3 |
HIP 95396 |
15.98 |
| 2026-02-12 12:00 |
19:24:28.09 |
-43:57:07.5 |
HIP 95396 |
13.85 |
| 2026-02-13 00:00 |
19:25:13.37 |
-43:56:32.7 |
HIP 95445 |
15.46 |
| 2026-02-13 12:00 |
19:25:58.57 |
-43:55:58.0 |
HIP 95445 |
19.32 |
| 2026-02-14 00:00 |
19:26:43.71 |
-43:55:23.4 |
HIP 95734 |
17.79 |
| 2026-02-14 12:00 |
19:27:28.77 |
-43:54:48.8 |
HIP 95734 |
9.68 |
| 2026-02-15 00:00 |
19:28:13.76 |
-43:54:14.4 |
HIP 95734 |
1.83 |
| 2026-02-15 12:00 |
19:28:58.69 |
-43:53:40.0 |
HIP 95734 |
6.70 |
| 2026-02-16 00:00 |
19:29:43.54 |
-43:53:05.7 |
HIP 95734 |
14.76 |
| 2026-02-16 12:00 |
19:30:28.31 |
-43:52:31.5 |
HIP 95734 |
22.83 |
| 2026-02-17 00:00 |
19:31:13.01 |
-43:51:57.4 |
HIP 95734 |
30.90 |
| 2026-02-17 12:00 |
19:31:57.63 |
-43:51:23.5 |
HIP 96232 |
33.15 |
| 2026-02-18 00:00 |
19:32:42.18 |
-43:50:49.6 |
HIP 96232 |
27.59 |
| 2026-02-18 12:00 |
19:33:26.65 |
-43:50:15.9 |
HIP 96232 |
23.55 |
| 2026-02-19 00:00 |
19:34:11.04 |
-43:49:42.3 |
HIP 96232 |
21.86 |
| 2026-02-19 12:00 |
19:34:55.35 |
-43:49:08.8 |
HIP 96232 |
23.04 |
| 2026-02-20 00:00 |
19:35:39.57 |
-43:48:35.5 |
HIP 96232 |
26.69 |
| 2026-02-20 12:00 |
19:36:23.72 |
-43:48:02.4 |
HIP 96519 |
30.64 |
| 2026-02-21 00:00 |
19:37:07.78 |
-43:47:29.3 |
HIP 96519 |
29.63 |
| 2026-02-21 12:00 |
19:37:51.76 |
-43:46:56.5 |
HIP 96519 |
30.70 |
| 2026-02-22 00:00 |
19:38:35.65 |
-43:46:23.8 |
HIP 96519 |
33.65 |
| 2026-02-22 12:00 |
19:39:19.46 |
-43:45:51.2 |
HIP 96832 |
29.72 |
| 2026-02-23 00:00 |
19:40:03.18 |
-43:45:18.9 |
HIP 96832 |
25.45 |
| 2026-02-23 12:00 |
19:40:46.81 |
-43:44:46.7 |
HIP 96832 |
23.21 |
| 2026-02-24 00:00 |
19:41:30.35 |
-43:44:14.7 |
HIP 96832 |
23.56 |