| 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) |
| 2026-05-12 00:00 |
18:53:59.39 |
-76:59:09.8 |
HIP 92681 |
5.18 |
| 2026-05-12 12:00 |
18:53:55.63 |
-76:59:23.9 |
HIP 92681 |
4.87 |
| 2026-05-13 00:00 |
18:53:51.83 |
-76:59:37.8 |
HIP 92681 |
4.56 |
| 2026-05-13 12:00 |
18:53:47.98 |
-76:59:51.7 |
HIP 92681 |
4.24 |
| 2026-05-14 00:00 |
18:53:44.09 |
-77:00:05.5 |
HIP 92681 |
3.93 |
| 2026-05-14 12:00 |
18:53:40.16 |
-77:00:19.2 |
HIP 92681 |
3.62 |
| 2026-05-15 00:00 |
18:53:36.19 |
-77:00:32.9 |
HIP 92681 |
3.31 |
| 2026-05-15 12:00 |
18:53:32.18 |
-77:00:46.4 |
HIP 92681 |
3.00 |
| 2026-05-16 00:00 |
18:53:28.12 |
-77:00:59.8 |
HIP 92681 |
2.70 |
| 2026-05-16 12:00 |
18:53:24.02 |
-77:01:13.1 |
HIP 92681 |
2.40 |
| 2026-05-17 00:00 |
18:53:19.88 |
-77:01:26.4 |
HIP 92681 |
2.10 |
| 2026-05-17 12:00 |
18:53:15.70 |
-77:01:39.5 |
HIP 92681 |
1.82 |
| 2026-05-18 00:00 |
18:53:11.48 |
-77:01:52.6 |
HIP 92681 |
1.54 |
| 2026-05-18 12:00 |
18:53:07.22 |
-77:02:05.5 |
HIP 92681 |
1.30 |
| 2026-05-19 00:00 |
18:53:02.92 |
-77:02:18.4 |
HIP 92681 |
1.09 |
| 2026-05-19 12:00 |
18:52:58.58 |
-77:02:31.1 |
HIP 92681 |
0.96 |
| 2026-05-20 00:00 |
18:52:54.21 |
-77:02:43.8 |
HIP 92681 |
0.93 |
| 2026-05-20 12:00 |
18:52:49.79 |
-77:02:56.3 |
HIP 92681 |
1.01 |
| 2026-05-21 00:00 |
18:52:45.33 |
-77:03:08.8 |
HIP 92681 |
1.18 |
| 2026-05-21 12:00 |
18:52:40.84 |
-77:03:21.1 |
HIP 92681 |
1.40 |
| 2026-05-22 00:00 |
18:52:36.31 |
-77:03:33.3 |
HIP 92681 |
1.66 |
| 2026-05-22 12:00 |
18:52:31.74 |
-77:03:45.5 |
HIP 92681 |
1.95 |
| 2026-05-23 00:00 |
18:52:27.14 |
-77:03:57.5 |
HIP 92681 |
2.24 |
| 2026-05-23 12:00 |
18:52:22.49 |
-77:04:09.4 |
HIP 92681 |
2.55 |
| 2026-05-24 00:00 |
18:52:17.82 |
-77:04:21.2 |
HIP 92681 |
2.86 |
| 2026-05-24 12:00 |
18:52:13.10 |
-77:04:32.9 |
HIP 92681 |
3.17 |
| 2026-05-25 00:00 |
18:52:08.36 |
-77:04:44.5 |
HIP 92681 |
3.49 |
| 2026-05-25 12:00 |
18:52:03.57 |
-77:04:55.9 |
HIP 92681 |
3.81 |
| 2026-05-26 00:00 |
18:51:58.75 |
-77:05:07.3 |
HIP 92681 |
4.14 |
| 2026-05-26 12:00 |
18:51:53.90 |
-77:05:18.5 |
HIP 92681 |
4.46 |
| 2026-05-27 00:00 |
18:51:49.02 |
-77:05:29.7 |
HIP 92681 |
4.79 |
| 2026-05-27 12:00 |
18:51:44.10 |
-77:05:40.7 |
HIP 92681 |
5.11 |
| 2026-05-28 00:00 |
18:51:39.15 |
-77:05:51.6 |
HIP 92681 |
5.44 |
| 2026-05-28 12:00 |
18:51:34.16 |
-77:06:02.3 |
HIP 92681 |
5.77 |
| 2026-05-29 00:00 |
18:51:29.14 |
-77:06:13.0 |
HIP 92681 |
6.10 |
| 2026-05-29 12:00 |
18:51:24.09 |
-77:06:23.6 |
HIP 92681 |
6.43 |
| 2026-05-30 00:00 |
18:51:19.01 |
-77:06:34.0 |
HIP 92681 |
6.77 |
| 2026-05-30 12:00 |
18:51:13.90 |
-77:06:44.3 |
HIP 92681 |
7.10 |
| 2026-05-31 00:00 |
18:51:08.76 |
-77:06:54.5 |
HIP 92681 |
7.43 |
| 2026-05-31 12:00 |
18:51:03.58 |
-77:07:04.5 |
HIP 92681 |
7.76 |
| 2026-06-01 00:00 |
18:50:58.38 |
-77:07:14.5 |
HIP 92681 |
8.10 |
| 2026-06-01 12:00 |
18:50:53.15 |
-77:07:24.3 |
HIP 92681 |
8.43 |
| 2026-06-02 00:00 |
18:50:47.88 |
-77:07:34.0 |
HIP 92681 |
8.77 |