C/1967 M1 (Mitchell-Jones-Gerber)
| Parameter |
Value |
| Designation |
C/1967 M1 (Mitchell-Jones-Gerber) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1967-06-16T18:50:32.415360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
39 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
13.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1967-07-23.0000000 |
| e |
1.00000000 |
| q (au) |
0.178250 |
| a (au) |
- |
| i (deg) |
56.708043 |
| Ω (om, deg) |
32.293259 |
| ω (w, deg) |
78.943837 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (7.456 + 4.284\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.456 |
| n |
4.284 |
| gf |
1.000 |
| gb |
-0.591 |
| k |
0.800 |
| 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 |
18:50:45.96 |
-76:11:18.0 |
HIP 92045 |
18.35 |
| 2026-02-03 12:00 |
18:50:51.01 |
-76:11:26.1 |
HIP 92045 |
18.67 |
| 2026-02-04 00:00 |
18:50:56.03 |
-76:11:34.3 |
HIP 92045 |
18.98 |
| 2026-02-04 12:00 |
18:51:01.03 |
-76:11:42.7 |
HIP 92045 |
19.29 |
| 2026-02-05 00:00 |
18:51:06.00 |
-76:11:51.1 |
HIP 92045 |
19.60 |
| 2026-02-05 12:00 |
18:51:10.94 |
-76:11:59.7 |
HIP 92045 |
19.91 |
| 2026-02-06 00:00 |
18:51:15.85 |
-76:12:08.4 |
HIP 92045 |
20.22 |
| 2026-02-06 12:00 |
18:51:20.74 |
-76:12:17.3 |
HIP 92045 |
20.53 |
| 2026-02-07 00:00 |
18:51:25.60 |
-76:12:26.2 |
HIP 92045 |
20.84 |
| 2026-02-07 12:00 |
18:51:30.44 |
-76:12:35.3 |
HIP 92045 |
21.14 |
| 2026-02-08 00:00 |
18:51:35.24 |
-76:12:44.5 |
HIP 92045 |
21.45 |
| 2026-02-08 12:00 |
18:51:40.02 |
-76:12:53.8 |
HIP 92045 |
21.75 |
| 2026-02-09 00:00 |
18:51:44.76 |
-76:13:03.3 |
HIP 92045 |
22.06 |
| 2026-02-09 12:00 |
18:51:49.48 |
-76:13:12.8 |
HIP 92045 |
22.36 |
| 2026-02-10 00:00 |
18:51:54.17 |
-76:13:22.5 |
HIP 92045 |
22.66 |
| 2026-02-10 12:00 |
18:51:58.82 |
-76:13:32.3 |
HIP 92045 |
22.96 |
| 2026-02-11 00:00 |
18:52:03.45 |
-76:13:42.2 |
HIP 92045 |
23.26 |
| 2026-02-11 12:00 |
18:52:08.05 |
-76:13:52.2 |
HIP 92045 |
23.56 |
| 2026-02-12 00:00 |
18:52:12.61 |
-76:14:02.4 |
HIP 92045 |
23.86 |
| 2026-02-12 12:00 |
18:52:17.14 |
-76:14:12.6 |
HIP 92045 |
24.16 |
| 2026-02-13 00:00 |
18:52:21.64 |
-76:14:23.0 |
HIP 92045 |
24.45 |
| 2026-02-13 12:00 |
18:52:26.11 |
-76:14:33.5 |
HIP 92045 |
24.75 |
| 2026-02-14 00:00 |
18:52:30.55 |
-76:14:44.1 |
HIP 92045 |
25.04 |
| 2026-02-14 12:00 |
18:52:34.95 |
-76:14:54.8 |
HIP 92045 |
25.34 |
| 2026-02-15 00:00 |
18:52:39.32 |
-76:15:05.6 |
HIP 92045 |
25.63 |
| 2026-02-15 12:00 |
18:52:43.66 |
-76:15:16.5 |
HIP 92045 |
25.92 |
| 2026-02-16 00:00 |
18:52:47.96 |
-76:15:27.6 |
HIP 92045 |
26.21 |
| 2026-02-16 12:00 |
18:52:52.22 |
-76:15:38.7 |
HIP 92045 |
26.50 |
| 2026-02-17 00:00 |
18:52:56.46 |
-76:15:50.0 |
HIP 92045 |
26.79 |
| 2026-02-17 12:00 |
18:53:00.66 |
-76:16:01.3 |
HIP 92045 |
27.07 |
| 2026-02-18 00:00 |
18:53:04.82 |
-76:16:12.8 |
HIP 92045 |
27.36 |
| 2026-02-18 12:00 |
18:53:08.95 |
-76:16:24.4 |
HIP 92045 |
27.64 |
| 2026-02-19 00:00 |
18:53:13.04 |
-76:16:36.1 |
HIP 92773 |
27.81 |
| 2026-02-19 12:00 |
18:53:17.09 |
-76:16:47.9 |
HIP 92773 |
27.98 |
| 2026-02-20 00:00 |
18:53:21.11 |
-76:16:59.7 |
HIP 92773 |
28.14 |
| 2026-02-20 12:00 |
18:53:25.09 |
-76:17:11.7 |
HIP 92773 |
28.32 |
| 2026-02-21 00:00 |
18:53:29.03 |
-76:17:23.8 |
HIP 92773 |
28.49 |
| 2026-02-21 12:00 |
18:53:32.94 |
-76:17:36.0 |
HIP 92970 |
28.66 |
| 2026-02-22 00:00 |
18:53:36.81 |
-76:17:48.3 |
HIP 92970 |
28.77 |
| 2026-02-22 12:00 |
18:53:40.64 |
-76:18:00.7 |
HIP 92970 |
28.88 |
| 2026-02-23 00:00 |
18:53:44.43 |
-76:18:13.2 |
HIP 92970 |
29.00 |
| 2026-02-23 12:00 |
18:53:48.19 |
-76:18:25.8 |
HIP 92970 |
29.12 |
| 2026-02-24 00:00 |
18:53:51.90 |
-76:18:38.4 |
HIP 92970 |
29.25 |