| 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 |
0.999 |
| 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) |
| 2026-07-29 00:00 |
18:39:32.99 |
-77:10:27.0 |
HIP 91549 |
16.88 |
| 2026-07-29 12:00 |
18:39:27.51 |
-77:10:20.2 |
HIP 91549 |
16.80 |
| 2026-07-30 00:00 |
18:39:22.05 |
-77:10:13.1 |
HIP 91549 |
16.73 |
| 2026-07-30 12:00 |
18:39:16.61 |
-77:10:06.0 |
HIP 91549 |
16.67 |
| 2026-07-31 00:00 |
18:39:11.21 |
-77:09:58.7 |
HIP 91549 |
16.61 |
| 2026-07-31 12:00 |
18:39:05.83 |
-77:09:51.2 |
HIP 91549 |
16.55 |
| 2026-08-01 00:00 |
18:39:00.48 |
-77:09:43.7 |
HIP 91549 |
16.50 |
| 2026-08-01 12:00 |
18:38:55.16 |
-77:09:36.0 |
HIP 91549 |
16.45 |
| 2026-08-02 00:00 |
18:38:49.86 |
-77:09:28.2 |
HIP 91549 |
16.40 |
| 2026-08-02 12:00 |
18:38:44.59 |
-77:09:20.2 |
HIP 91549 |
16.36 |
| 2026-08-03 00:00 |
18:38:39.36 |
-77:09:12.1 |
HIP 91549 |
16.32 |
| 2026-08-03 12:00 |
18:38:34.15 |
-77:09:03.9 |
HIP 91549 |
16.28 |
| 2026-08-04 00:00 |
18:38:28.97 |
-77:08:55.5 |
HIP 91549 |
16.25 |
| 2026-08-04 12:00 |
18:38:23.82 |
-77:08:47.1 |
HIP 91549 |
16.23 |
| 2026-08-05 00:00 |
18:38:18.71 |
-77:08:38.4 |
HIP 91549 |
16.20 |
| 2026-08-05 12:00 |
18:38:13.62 |
-77:08:29.7 |
HIP 91549 |
16.18 |
| 2026-08-06 00:00 |
18:38:08.57 |
-77:08:20.8 |
HIP 91549 |
16.17 |
| 2026-08-06 12:00 |
18:38:03.55 |
-77:08:11.8 |
HIP 91549 |
16.15 |
| 2026-08-07 00:00 |
18:37:58.56 |
-77:08:02.7 |
HIP 91549 |
16.14 |
| 2026-08-07 12:00 |
18:37:53.60 |
-77:07:53.5 |
HIP 91549 |
16.14 |
| 2026-08-08 00:00 |
18:37:48.67 |
-77:07:44.1 |
HIP 91549 |
16.14 |
| 2026-08-08 12:00 |
18:37:43.78 |
-77:07:34.6 |
HIP 91549 |
16.14 |
| 2026-08-09 00:00 |
18:37:38.93 |
-77:07:25.0 |
HIP 91549 |
16.14 |
| 2026-08-09 12:00 |
18:37:34.11 |
-77:07:15.3 |
HIP 91549 |
16.15 |
| 2026-08-10 00:00 |
18:37:29.32 |
-77:07:05.4 |
HIP 91549 |
16.17 |
| 2026-08-10 12:00 |
18:37:24.57 |
-77:06:55.4 |
HIP 91549 |
16.18 |
| 2026-08-11 00:00 |
18:37:19.85 |
-77:06:45.3 |
HIP 91549 |
16.20 |
| 2026-08-11 12:00 |
18:37:15.17 |
-77:06:35.1 |
HIP 91549 |
16.22 |
| 2026-08-12 00:00 |
18:37:10.53 |
-77:06:24.8 |
HIP 91549 |
16.25 |
| 2026-08-12 12:00 |
18:37:05.92 |
-77:06:14.3 |
HIP 91549 |
16.28 |
| 2026-08-13 00:00 |
18:37:01.35 |
-77:06:03.8 |
HIP 91549 |
16.31 |
| 2026-08-13 12:00 |
18:36:56.82 |
-77:05:53.1 |
HIP 91549 |
16.35 |
| 2026-08-14 00:00 |
18:36:52.32 |
-77:05:42.3 |
HIP 91549 |
16.38 |
| 2026-08-14 12:00 |
18:36:47.87 |
-77:05:31.4 |
HIP 91549 |
16.43 |
| 2026-08-15 00:00 |
18:36:43.45 |
-77:05:20.3 |
HIP 91549 |
16.47 |
| 2026-08-15 12:00 |
18:36:39.07 |
-77:05:09.2 |
HIP 91549 |
16.52 |
| 2026-08-16 00:00 |
18:36:34.73 |
-77:04:58.0 |
HIP 91549 |
16.57 |
| 2026-08-16 12:00 |
18:36:30.43 |
-77:04:46.6 |
HIP 91549 |
16.62 |
| 2026-08-17 00:00 |
18:36:26.17 |
-77:04:35.1 |
HIP 91549 |
16.68 |
| 2026-08-17 12:00 |
18:36:21.95 |
-77:04:23.6 |
HIP 91549 |
16.73 |
| 2026-08-18 00:00 |
18:36:17.77 |
-77:04:11.9 |
HIP 91549 |
16.79 |
| 2026-08-18 12:00 |
18:36:13.63 |
-77:04:00.1 |
HIP 91549 |
16.86 |
| 2026-08-19 00:00 |
18:36:09.54 |
-77:03:48.2 |
HIP 91549 |
16.92 |