| Parameter |
Value |
| Designation |
C/1941 B2 (de Kock-Paraskevopoulos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-01-27T15:47:05.280000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
130 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1941-02-15.0000000 |
| e |
0.99910200 |
| q (au) |
0.790033 |
| a (au) |
879.769488 |
| i (deg) |
168.203900 |
| Ω (om, deg) |
43.106900 |
| ω (w, deg) |
268.699700 |
| M (ma, deg) |
0.000693 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.838 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.838 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.846 |
| k |
0.901 |
| 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 |
21:32:54.20 |
-02:18:26.4 |
HIP 106461 |
13.21 |
| 2026-06-01 12:00 |
21:32:53.84 |
-02:18:24.8 |
HIP 106461 |
13.30 |
| 2026-06-02 00:00 |
21:32:53.48 |
-02:18:23.3 |
HIP 106461 |
13.39 |
| 2026-06-02 12:00 |
21:32:53.11 |
-02:18:21.9 |
HIP 106461 |
13.49 |
| 2026-06-03 00:00 |
21:32:52.73 |
-02:18:20.5 |
HIP 106461 |
13.59 |
| 2026-06-03 12:00 |
21:32:52.35 |
-02:18:19.1 |
HIP 106461 |
13.69 |
| 2026-06-04 00:00 |
21:32:51.95 |
-02:18:17.8 |
HIP 106461 |
13.79 |
| 2026-06-04 12:00 |
21:32:51.55 |
-02:18:16.5 |
HIP 106461 |
13.89 |
| 2026-06-05 00:00 |
21:32:51.14 |
-02:18:15.3 |
HIP 106461 |
13.99 |
| 2026-06-05 12:00 |
21:32:50.72 |
-02:18:14.2 |
HIP 106461 |
14.10 |
| 2026-06-06 00:00 |
21:32:50.30 |
-02:18:13.1 |
HIP 106461 |
14.21 |
| 2026-06-06 12:00 |
21:32:49.86 |
-02:18:12.0 |
HIP 106461 |
14.31 |
| 2026-06-07 00:00 |
21:32:49.42 |
-02:18:11.0 |
HIP 106461 |
14.43 |
| 2026-06-07 12:00 |
21:32:48.97 |
-02:18:10.1 |
HIP 106461 |
14.54 |
| 2026-06-08 00:00 |
21:32:48.51 |
-02:18:09.2 |
HIP 106461 |
14.65 |
| 2026-06-08 12:00 |
21:32:48.04 |
-02:18:08.4 |
HIP 106461 |
14.77 |
| 2026-06-09 00:00 |
21:32:47.57 |
-02:18:07.6 |
HIP 106461 |
14.89 |
| 2026-06-09 12:00 |
21:32:47.09 |
-02:18:06.8 |
HIP 106461 |
15.01 |
| 2026-06-10 00:00 |
21:32:46.60 |
-02:18:06.1 |
HIP 106461 |
15.13 |
| 2026-06-10 12:00 |
21:32:46.10 |
-02:18:05.5 |
HIP 106461 |
15.25 |
| 2026-06-11 00:00 |
21:32:45.59 |
-02:18:04.9 |
HIP 106461 |
15.37 |
| 2026-06-11 12:00 |
21:32:45.08 |
-02:18:04.4 |
HIP 106461 |
15.50 |
| 2026-06-12 00:00 |
21:32:44.56 |
-02:18:03.9 |
HIP 106461 |
15.63 |
| 2026-06-12 12:00 |
21:32:44.03 |
-02:18:03.5 |
HIP 106461 |
15.76 |
| 2026-06-13 00:00 |
21:32:43.49 |
-02:18:03.1 |
HIP 106461 |
15.89 |
| 2026-06-13 12:00 |
21:32:42.94 |
-02:18:02.8 |
HIP 106461 |
16.02 |
| 2026-06-14 00:00 |
21:32:42.39 |
-02:18:02.5 |
HIP 106461 |
16.16 |
| 2026-06-14 12:00 |
21:32:41.83 |
-02:18:02.3 |
HIP 106461 |
16.29 |
| 2026-06-15 00:00 |
21:32:41.26 |
-02:18:02.2 |
HIP 106461 |
16.43 |
| 2026-06-15 12:00 |
21:32:40.69 |
-02:18:02.0 |
HIP 106461 |
16.57 |
| 2026-06-16 00:00 |
21:32:40.11 |
-02:18:02.0 |
HIP 106461 |
16.71 |
| 2026-06-16 12:00 |
21:32:39.52 |
-02:18:02.0 |
HIP 106461 |
16.85 |
| 2026-06-17 00:00 |
21:32:38.92 |
-02:18:02.0 |
HIP 106461 |
17.00 |
| 2026-06-17 12:00 |
21:32:38.31 |
-02:18:02.1 |
HIP 106461 |
17.14 |
| 2026-06-18 00:00 |
21:32:37.70 |
-02:18:02.3 |
HIP 106461 |
17.29 |
| 2026-06-18 12:00 |
21:32:37.08 |
-02:18:02.5 |
HIP 106461 |
17.44 |
| 2026-06-19 00:00 |
21:32:36.46 |
-02:18:02.8 |
HIP 106461 |
17.59 |
| 2026-06-19 12:00 |
21:32:35.82 |
-02:18:03.1 |
HIP 106461 |
17.75 |
| 2026-06-20 00:00 |
21:32:35.18 |
-02:18:03.4 |
HIP 106461 |
17.90 |
| 2026-06-20 12:00 |
21:32:34.54 |
-02:18:03.8 |
HIP 106461 |
18.06 |
| 2026-06-21 00:00 |
21:32:33.88 |
-02:18:04.3 |
HIP 106461 |
18.21 |
| 2026-06-21 12:00 |
21:32:33.22 |
-02:18:04.8 |
HIP 106461 |
18.37 |
| 2026-06-22 00:00 |
21:32:32.55 |
-02:18:05.4 |
HIP 106461 |
18.53 |