| 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) |
| 2026-07-29 00:00 |
05:13:20.36 |
-51:37:38.9 |
HIP 24253 |
10.18 |
| 2026-07-29 12:00 |
05:13:21.55 |
-51:37:50.3 |
HIP 24253 |
10.43 |
| 2026-07-30 00:00 |
05:13:22.72 |
-51:38:01.8 |
HIP 24253 |
10.68 |
| 2026-07-30 12:00 |
05:13:23.89 |
-51:38:13.4 |
HIP 24253 |
10.93 |
| 2026-07-31 00:00 |
05:13:25.04 |
-51:38:25.0 |
HIP 24253 |
11.18 |
| 2026-07-31 12:00 |
05:13:26.19 |
-51:38:36.8 |
HIP 24253 |
11.43 |
| 2026-08-01 00:00 |
05:13:27.32 |
-51:38:48.6 |
HIP 24253 |
11.68 |
| 2026-08-01 12:00 |
05:13:28.44 |
-51:39:00.6 |
HIP 24253 |
11.93 |
| 2026-08-02 00:00 |
05:13:29.55 |
-51:39:12.6 |
HIP 24253 |
12.18 |
| 2026-08-02 12:00 |
05:13:30.65 |
-51:39:24.7 |
HIP 24253 |
12.43 |
| 2026-08-03 00:00 |
05:13:31.74 |
-51:39:36.9 |
HIP 24253 |
12.68 |
| 2026-08-03 12:00 |
05:13:32.82 |
-51:39:49.2 |
HIP 24253 |
12.93 |
| 2026-08-04 00:00 |
05:13:33.89 |
-51:40:01.6 |
HIP 24253 |
13.18 |
| 2026-08-04 12:00 |
05:13:34.94 |
-51:40:14.1 |
HIP 24253 |
13.43 |
| 2026-08-05 00:00 |
05:13:35.99 |
-51:40:26.6 |
HIP 24253 |
13.68 |
| 2026-08-05 12:00 |
05:13:37.02 |
-51:40:39.2 |
HIP 24253 |
13.93 |
| 2026-08-06 00:00 |
05:13:38.04 |
-51:40:51.9 |
HIP 24253 |
14.18 |
| 2026-08-06 12:00 |
05:13:39.05 |
-51:41:04.7 |
HIP 24253 |
14.43 |
| 2026-08-07 00:00 |
05:13:40.04 |
-51:41:17.6 |
HIP 24253 |
14.67 |
| 2026-08-07 12:00 |
05:13:41.03 |
-51:41:30.5 |
HIP 24253 |
14.92 |
| 2026-08-08 00:00 |
05:13:42.00 |
-51:41:43.5 |
HIP 24253 |
15.17 |
| 2026-08-08 12:00 |
05:13:42.96 |
-51:41:56.6 |
HIP 24253 |
15.42 |
| 2026-08-09 00:00 |
05:13:43.91 |
-51:42:09.8 |
HIP 24253 |
15.66 |
| 2026-08-09 12:00 |
05:13:44.85 |
-51:42:23.1 |
HIP 24253 |
15.91 |
| 2026-08-10 00:00 |
05:13:45.77 |
-51:42:36.4 |
HIP 24253 |
16.16 |
| 2026-08-10 12:00 |
05:13:46.69 |
-51:42:49.8 |
HIP 24253 |
16.40 |
| 2026-08-11 00:00 |
05:13:47.59 |
-51:43:03.3 |
HIP 24253 |
16.65 |
| 2026-08-11 12:00 |
05:13:48.47 |
-51:43:16.8 |
HIP 24253 |
16.90 |
| 2026-08-12 00:00 |
05:13:49.35 |
-51:43:30.5 |
HIP 24253 |
17.14 |
| 2026-08-12 12:00 |
05:13:50.21 |
-51:43:44.1 |
HIP 24253 |
17.39 |
| 2026-08-13 00:00 |
05:13:51.06 |
-51:43:57.9 |
HIP 24253 |
17.63 |
| 2026-08-13 12:00 |
05:13:51.90 |
-51:44:11.7 |
HIP 24384 |
17.65 |
| 2026-08-14 00:00 |
05:13:52.72 |
-51:44:25.6 |
HIP 24384 |
17.42 |
| 2026-08-14 12:00 |
05:13:53.53 |
-51:44:39.6 |
HIP 24384 |
17.18 |
| 2026-08-15 00:00 |
05:13:54.33 |
-51:44:53.6 |
HIP 24384 |
16.95 |
| 2026-08-15 12:00 |
05:13:55.11 |
-51:45:07.7 |
HIP 24384 |
16.72 |
| 2026-08-16 00:00 |
05:13:55.88 |
-51:45:21.9 |
HIP 24384 |
16.48 |
| 2026-08-16 12:00 |
05:13:56.64 |
-51:45:36.1 |
HIP 24384 |
16.25 |
| 2026-08-17 00:00 |
05:13:57.39 |
-51:45:50.4 |
HIP 24384 |
16.02 |
| 2026-08-17 12:00 |
05:13:58.12 |
-51:46:04.7 |
HIP 24384 |
15.78 |
| 2026-08-18 00:00 |
05:13:58.84 |
-51:46:19.1 |
HIP 24384 |
15.55 |
| 2026-08-18 12:00 |
05:13:59.54 |
-51:46:33.6 |
HIP 24384 |
15.31 |
| 2026-08-19 00:00 |
05:14:00.23 |
-51:46:48.1 |
HIP 24384 |
15.08 |