| Parameter |
Value |
| Designation |
C/1975 N1 (Kobayashi-Berger-Milon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-09-05T08:02:10.029120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
390 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
11.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1975-08-09.0000000 |
| e |
1.00009176 |
| q (au) |
0.425564 |
| a (au) |
-4637.833606 |
| i (deg) |
80.781301 |
| Ω (om, deg) |
296.352017 |
| ω (w, deg) |
116.969468 |
| M (ma, deg) |
-0.000085 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.113 + 3.526\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.113 |
| n |
3.526 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.975 |
| δ90 |
8.837 |
| 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 |
06:09:54.56 |
-86:31:36.5 |
HIP 28682 |
16.59 |
| 2026-07-29 12:00 |
06:10:15.30 |
-86:31:48.6 |
HIP 28682 |
16.51 |
| 2026-07-30 00:00 |
06:10:35.95 |
-86:32:00.9 |
HIP 28682 |
16.43 |
| 2026-07-30 12:00 |
06:10:56.52 |
-86:32:13.3 |
HIP 28682 |
16.36 |
| 2026-07-31 00:00 |
06:11:17.01 |
-86:32:25.8 |
HIP 28682 |
16.29 |
| 2026-07-31 12:00 |
06:11:37.42 |
-86:32:38.4 |
HIP 28682 |
16.23 |
| 2026-08-01 00:00 |
06:11:57.75 |
-86:32:51.2 |
HIP 28682 |
16.17 |
| 2026-08-01 12:00 |
06:12:17.99 |
-86:33:04.0 |
HIP 28682 |
16.12 |
| 2026-08-02 00:00 |
06:12:38.15 |
-86:33:17.0 |
HIP 28682 |
16.08 |
| 2026-08-02 12:00 |
06:12:58.22 |
-86:33:30.1 |
HIP 28682 |
16.04 |
| 2026-08-03 00:00 |
06:13:18.21 |
-86:33:43.4 |
HIP 28682 |
16.00 |
| 2026-08-03 12:00 |
06:13:38.11 |
-86:33:56.7 |
HIP 28682 |
15.97 |
| 2026-08-04 00:00 |
06:13:57.91 |
-86:34:10.2 |
HIP 28682 |
15.95 |
| 2026-08-04 12:00 |
06:14:17.63 |
-86:34:23.8 |
HIP 28682 |
15.93 |
| 2026-08-05 00:00 |
06:14:37.26 |
-86:34:37.5 |
HIP 28682 |
15.92 |
| 2026-08-05 12:00 |
06:14:56.79 |
-86:34:51.3 |
HIP 28682 |
15.91 |
| 2026-08-06 00:00 |
06:15:16.23 |
-86:35:05.2 |
HIP 28682 |
15.91 |
| 2026-08-06 12:00 |
06:15:35.57 |
-86:35:19.3 |
HIP 28682 |
15.91 |
| 2026-08-07 00:00 |
06:15:54.82 |
-86:35:33.4 |
HIP 28682 |
15.92 |
| 2026-08-07 12:00 |
06:16:13.97 |
-86:35:47.7 |
HIP 28682 |
15.94 |
| 2026-08-08 00:00 |
06:16:33.02 |
-86:36:02.1 |
HIP 28682 |
15.96 |
| 2026-08-08 12:00 |
06:16:51.97 |
-86:36:16.6 |
HIP 28682 |
15.98 |
| 2026-08-09 00:00 |
06:17:10.82 |
-86:36:31.3 |
HIP 28682 |
16.02 |
| 2026-08-09 12:00 |
06:17:29.57 |
-86:36:46.0 |
HIP 28682 |
16.05 |
| 2026-08-10 00:00 |
06:17:48.21 |
-86:37:00.9 |
HIP 28682 |
16.09 |
| 2026-08-10 12:00 |
06:18:06.75 |
-86:37:15.8 |
HIP 28682 |
16.14 |
| 2026-08-11 00:00 |
06:18:25.17 |
-86:37:30.9 |
HIP 28682 |
16.19 |
| 2026-08-11 12:00 |
06:18:43.49 |
-86:37:46.1 |
HIP 28682 |
16.25 |
| 2026-08-12 00:00 |
06:19:01.71 |
-86:38:01.4 |
HIP 28682 |
16.31 |
| 2026-08-12 12:00 |
06:19:19.80 |
-86:38:16.8 |
HIP 28682 |
16.38 |
| 2026-08-13 00:00 |
06:19:37.79 |
-86:38:32.3 |
HIP 28682 |
16.45 |
| 2026-08-13 12:00 |
06:19:55.66 |
-86:38:47.9 |
HIP 28682 |
16.53 |
| 2026-08-14 00:00 |
06:20:13.42 |
-86:39:03.7 |
HIP 28682 |
16.61 |
| 2026-08-14 12:00 |
06:20:31.06 |
-86:39:19.5 |
HIP 28682 |
16.70 |
| 2026-08-15 00:00 |
06:20:48.59 |
-86:39:35.5 |
HIP 28682 |
16.79 |
| 2026-08-15 12:00 |
06:21:05.99 |
-86:39:51.5 |
HIP 28682 |
16.89 |
| 2026-08-16 00:00 |
06:21:23.27 |
-86:40:07.7 |
HIP 28682 |
16.99 |
| 2026-08-16 12:00 |
06:21:40.43 |
-86:40:23.9 |
HIP 28682 |
17.09 |
| 2026-08-17 00:00 |
06:21:57.47 |
-86:40:40.3 |
HIP 28682 |
17.20 |
| 2026-08-17 12:00 |
06:22:14.39 |
-86:40:56.8 |
HIP 28682 |
17.31 |
| 2026-08-18 00:00 |
06:22:31.18 |
-86:41:13.3 |
HIP 28682 |
17.43 |
| 2026-08-18 12:00 |
06:22:47.84 |
-86:41:30.0 |
HIP 28682 |
17.55 |
| 2026-08-19 00:00 |
06:23:04.37 |
-86:41:46.8 |
HIP 28682 |
17.67 |