C/1941 K1 (van Gent)
| Parameter |
Value |
| Designation |
C/1941 K1 (van Gent) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-09-03T04:25:14.880000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
318 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1941-09-03.0000000 |
| e |
1.00024300 |
| q (au) |
0.874789 |
| a (au) |
-3599.954732 |
| i (deg) |
94.516500 |
| Ω (om, deg) |
257.559800 |
| ω (w, deg) |
85.321900 |
| M (ma, deg) |
-0.000001 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.150 + 3.887\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.150 |
| n |
3.887 |
| gf |
1.000 |
| gb |
-0.946 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
05:07:59.03 |
-52:16:23.9 |
HIP 23808 |
11.60 |
| 2026-02-03 12:00 |
05:07:58.00 |
-52:16:11.0 |
HIP 23808 |
11.63 |
| 2026-02-04 00:00 |
05:07:56.98 |
-52:15:57.9 |
HIP 23808 |
11.66 |
| 2026-02-04 12:00 |
05:07:55.98 |
-52:15:44.8 |
HIP 23808 |
11.71 |
| 2026-02-05 00:00 |
05:07:54.99 |
-52:15:31.6 |
HIP 23808 |
11.76 |
| 2026-02-05 12:00 |
05:07:54.02 |
-52:15:18.3 |
HIP 23808 |
11.82 |
| 2026-02-06 00:00 |
05:07:53.06 |
-52:15:04.9 |
HIP 23808 |
11.89 |
| 2026-02-06 12:00 |
05:07:52.11 |
-52:14:51.4 |
HIP 23808 |
11.97 |
| 2026-02-07 00:00 |
05:07:51.17 |
-52:14:37.9 |
HIP 23808 |
12.05 |
| 2026-02-07 12:00 |
05:07:50.25 |
-52:14:24.3 |
HIP 23808 |
12.14 |
| 2026-02-08 00:00 |
05:07:49.35 |
-52:14:10.6 |
HIP 23808 |
12.24 |
| 2026-02-08 12:00 |
05:07:48.45 |
-52:13:56.9 |
HIP 23808 |
12.35 |
| 2026-02-09 00:00 |
05:07:47.58 |
-52:13:43.1 |
HIP 23808 |
12.46 |
| 2026-02-09 12:00 |
05:07:46.71 |
-52:13:29.2 |
HIP 23808 |
12.58 |
| 2026-02-10 00:00 |
05:07:45.86 |
-52:13:15.3 |
HIP 23808 |
12.71 |
| 2026-02-10 12:00 |
05:07:45.03 |
-52:13:01.2 |
HIP 23808 |
12.84 |
| 2026-02-11 00:00 |
05:07:44.21 |
-52:12:47.1 |
HIP 23808 |
12.98 |
| 2026-02-11 12:00 |
05:07:43.40 |
-52:12:33.0 |
HIP 23808 |
13.13 |
| 2026-02-12 00:00 |
05:07:42.61 |
-52:12:18.8 |
HIP 23808 |
13.28 |
| 2026-02-12 12:00 |
05:07:41.83 |
-52:12:04.5 |
HIP 23808 |
13.44 |
| 2026-02-13 00:00 |
05:07:41.07 |
-52:11:50.2 |
HIP 23808 |
13.60 |
| 2026-02-13 12:00 |
05:07:40.32 |
-52:11:35.8 |
HIP 23808 |
13.76 |
| 2026-02-14 00:00 |
05:07:39.58 |
-52:11:21.3 |
HIP 23808 |
13.94 |
| 2026-02-14 12:00 |
05:07:38.86 |
-52:11:06.8 |
HIP 23808 |
14.11 |
| 2026-02-15 00:00 |
05:07:38.16 |
-52:10:52.2 |
HIP 23808 |
14.29 |
| 2026-02-15 12:00 |
05:07:37.47 |
-52:10:37.6 |
HIP 23808 |
14.48 |
| 2026-02-16 00:00 |
05:07:36.80 |
-52:10:22.9 |
HIP 23808 |
14.67 |
| 2026-02-16 12:00 |
05:07:36.14 |
-52:10:08.1 |
HIP 23808 |
14.86 |
| 2026-02-17 00:00 |
05:07:35.49 |
-52:09:53.4 |
HIP 23808 |
15.06 |
| 2026-02-17 12:00 |
05:07:34.86 |
-52:09:38.5 |
HIP 23808 |
15.26 |
| 2026-02-18 00:00 |
05:07:34.25 |
-52:09:23.6 |
HIP 23808 |
15.46 |
| 2026-02-18 12:00 |
05:07:33.65 |
-52:09:08.7 |
HIP 23808 |
15.67 |
| 2026-02-19 00:00 |
05:07:33.07 |
-52:08:53.7 |
HIP 23808 |
15.88 |
| 2026-02-19 12:00 |
05:07:32.50 |
-52:08:38.7 |
HIP 23808 |
16.10 |
| 2026-02-20 00:00 |
05:07:31.94 |
-52:08:23.6 |
HIP 23808 |
16.31 |
| 2026-02-20 12:00 |
05:07:31.41 |
-52:08:08.5 |
HIP 23808 |
16.53 |
| 2026-02-21 00:00 |
05:07:30.88 |
-52:07:53.3 |
HIP 23808 |
16.75 |
| 2026-02-21 12:00 |
05:07:30.38 |
-52:07:38.1 |
HIP 23808 |
16.98 |
| 2026-02-22 00:00 |
05:07:29.88 |
-52:07:22.8 |
HIP 23808 |
17.21 |
| 2026-02-22 12:00 |
05:07:29.41 |
-52:07:07.6 |
HIP 23808 |
17.43 |
| 2026-02-23 00:00 |
05:07:28.95 |
-52:06:52.2 |
HIP 23808 |
17.67 |
| 2026-02-23 12:00 |
05:07:28.50 |
-52:06:36.9 |
HIP 23808 |
17.90 |
| 2026-02-24 00:00 |
05:07:28.07 |
-52:06:21.5 |
HIP 23808 |
18.13 |