| Parameter |
Value |
| Designation |
C/1939 B1 (Kozik-Peltier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1939-02-06T20:30:18.336960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:05Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1939-02-08.0000000 |
| e |
0.99545124 |
| q (au) |
0.716485 |
| a (au) |
157.511966 |
| i (deg) |
63.526389 |
| Ω (om, deg) |
289.609052 |
| ω (w, deg) |
169.024376 |
| M (ma, deg) |
0.000571 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.530 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.530 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
18:53:39.05 |
-39:54:04.7 |
HIP 92804 |
10.83 |
| 2026-07-29 12:00 |
18:53:37.69 |
-39:54:03.8 |
HIP 92804 |
11.09 |
| 2026-07-30 00:00 |
18:53:36.34 |
-39:54:02.9 |
HIP 92804 |
11.35 |
| 2026-07-30 12:00 |
18:53:35.00 |
-39:54:02.0 |
HIP 92804 |
11.61 |
| 2026-07-31 00:00 |
18:53:33.65 |
-39:54:01.0 |
HIP 92804 |
11.87 |
| 2026-07-31 12:00 |
18:53:32.32 |
-39:54:00.0 |
HIP 92804 |
12.12 |
| 2026-08-01 00:00 |
18:53:30.99 |
-39:53:58.9 |
HIP 92804 |
12.38 |
| 2026-08-01 12:00 |
18:53:29.66 |
-39:53:57.8 |
HIP 92804 |
12.63 |
| 2026-08-02 00:00 |
18:53:28.34 |
-39:53:56.6 |
HIP 92804 |
12.88 |
| 2026-08-02 12:00 |
18:53:27.03 |
-39:53:55.4 |
HIP 92804 |
13.14 |
| 2026-08-03 00:00 |
18:53:25.72 |
-39:53:54.2 |
HIP 92804 |
13.39 |
| 2026-08-03 12:00 |
18:53:24.42 |
-39:53:52.9 |
HIP 92804 |
13.64 |
| 2026-08-04 00:00 |
18:53:23.13 |
-39:53:51.6 |
HIP 92804 |
13.89 |
| 2026-08-04 12:00 |
18:53:21.84 |
-39:53:50.2 |
HIP 92804 |
14.13 |
| 2026-08-05 00:00 |
18:53:20.56 |
-39:53:48.7 |
HIP 92804 |
14.38 |
| 2026-08-05 12:00 |
18:53:19.28 |
-39:53:47.3 |
HIP 92804 |
14.63 |
| 2026-08-06 00:00 |
18:53:18.01 |
-39:53:45.8 |
HIP 92804 |
14.87 |
| 2026-08-06 12:00 |
18:53:16.75 |
-39:53:44.2 |
HIP 92804 |
15.12 |
| 2026-08-07 00:00 |
18:53:15.49 |
-39:53:42.6 |
HIP 92804 |
15.36 |
| 2026-08-07 12:00 |
18:53:14.24 |
-39:53:41.0 |
HIP 92804 |
15.60 |
| 2026-08-08 00:00 |
18:53:13.00 |
-39:53:39.3 |
HIP 92804 |
15.84 |
| 2026-08-08 12:00 |
18:53:11.76 |
-39:53:37.5 |
HIP 92804 |
16.08 |
| 2026-08-09 00:00 |
18:53:10.53 |
-39:53:35.8 |
HIP 92804 |
16.32 |
| 2026-08-09 12:00 |
18:53:09.31 |
-39:53:33.9 |
HIP 92804 |
16.55 |
| 2026-08-10 00:00 |
18:53:08.10 |
-39:53:32.1 |
HIP 92804 |
16.79 |
| 2026-08-10 12:00 |
18:53:06.89 |
-39:53:30.2 |
HIP 92804 |
17.02 |
| 2026-08-11 00:00 |
18:53:05.69 |
-39:53:28.2 |
HIP 92804 |
17.25 |
| 2026-08-11 12:00 |
18:53:04.50 |
-39:53:26.2 |
HIP 92804 |
17.48 |
| 2026-08-12 00:00 |
18:53:03.31 |
-39:53:24.2 |
HIP 92804 |
17.71 |
| 2026-08-12 12:00 |
18:53:02.14 |
-39:53:22.1 |
HIP 92804 |
17.94 |
| 2026-08-13 00:00 |
18:53:00.97 |
-39:53:20.0 |
HIP 92804 |
18.17 |
| 2026-08-13 12:00 |
18:52:59.81 |
-39:53:17.8 |
HIP 92534 |
18.21 |
| 2026-08-14 00:00 |
18:52:58.66 |
-39:53:15.6 |
HIP 92534 |
17.99 |
| 2026-08-14 12:00 |
18:52:57.51 |
-39:53:13.4 |
HIP 92534 |
17.77 |
| 2026-08-15 00:00 |
18:52:56.38 |
-39:53:11.1 |
HIP 92534 |
17.55 |
| 2026-08-15 12:00 |
18:52:55.25 |
-39:53:08.7 |
HIP 92534 |
17.33 |
| 2026-08-16 00:00 |
18:52:54.13 |
-39:53:06.4 |
HIP 92534 |
17.11 |
| 2026-08-16 12:00 |
18:52:53.02 |
-39:53:03.9 |
HIP 92534 |
16.89 |
| 2026-08-17 00:00 |
18:52:51.92 |
-39:53:01.5 |
HIP 92534 |
16.68 |
| 2026-08-17 12:00 |
18:52:50.82 |
-39:52:59.0 |
HIP 92534 |
16.46 |
| 2026-08-18 00:00 |
18:52:49.74 |
-39:52:56.4 |
HIP 92534 |
16.25 |
| 2026-08-18 12:00 |
18:52:48.66 |
-39:52:53.9 |
HIP 92534 |
16.04 |
| 2026-08-19 00:00 |
18:52:47.59 |
-39:52:51.3 |
HIP 92534 |
15.84 |