C/1960 M1 (Humason)
| Parameter |
Value |
| Designation |
C/1960 M1 (Humason) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-12-11T08:25:18.805440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
24 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1960-11-07.0000000 |
| e |
1.00033331 |
| q (au) |
4.267540 |
| a (au) |
-12803.528708 |
| i (deg) |
125.473935 |
| Ω (om, deg) |
307.270143 |
| ω (w, deg) |
46.494116 |
| M (ma, deg) |
0.000226 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.615 + 4.417\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.615 |
| n |
4.417 |
| gf |
1.000 |
| gb |
-0.736 |
| k |
1.000 |
| 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 |
07:33:53.21 |
+04:18:32.0 |
HIP 36884 |
18.29 |
| 2026-02-03 12:00 |
07:33:51.92 |
+04:18:36.7 |
HIP 36884 |
18.55 |
| 2026-02-04 00:00 |
07:33:50.62 |
+04:18:41.5 |
HIP 36884 |
18.81 |
| 2026-02-04 12:00 |
07:33:49.33 |
+04:18:46.3 |
HIP 36884 |
19.07 |
| 2026-02-05 00:00 |
07:33:48.05 |
+04:18:51.2 |
HIP 36884 |
19.33 |
| 2026-02-05 12:00 |
07:33:46.77 |
+04:18:56.1 |
HIP 36884 |
19.60 |
| 2026-02-06 00:00 |
07:33:45.50 |
+04:19:01.0 |
HIP 36884 |
19.86 |
| 2026-02-06 12:00 |
07:33:44.23 |
+04:19:06.0 |
HIP 36884 |
20.12 |
| 2026-02-07 00:00 |
07:33:42.97 |
+04:19:11.0 |
HIP 36884 |
20.39 |
| 2026-02-07 12:00 |
07:33:41.71 |
+04:19:16.0 |
HIP 36884 |
20.65 |
| 2026-02-08 00:00 |
07:33:40.45 |
+04:19:21.1 |
HIP 36884 |
20.92 |
| 2026-02-08 12:00 |
07:33:39.21 |
+04:19:26.2 |
HIP 36884 |
21.18 |
| 2026-02-09 00:00 |
07:33:37.96 |
+04:19:31.3 |
HIP 36884 |
21.45 |
| 2026-02-09 12:00 |
07:33:36.73 |
+04:19:36.5 |
HIP 36884 |
21.71 |
| 2026-02-10 00:00 |
07:33:35.50 |
+04:19:41.7 |
HIP 36884 |
21.98 |
| 2026-02-10 12:00 |
07:33:34.27 |
+04:19:46.9 |
HIP 36884 |
22.24 |
| 2026-02-11 00:00 |
07:33:33.06 |
+04:19:52.2 |
HIP 36884 |
22.51 |
| 2026-02-11 12:00 |
07:33:31.84 |
+04:19:57.5 |
HIP 36884 |
22.77 |
| 2026-02-12 00:00 |
07:33:30.64 |
+04:20:02.9 |
HIP 36884 |
23.04 |
| 2026-02-12 12:00 |
07:33:29.44 |
+04:20:08.2 |
HIP 36884 |
23.30 |
| 2026-02-13 00:00 |
07:33:28.24 |
+04:20:13.6 |
HIP 36884 |
23.56 |
| 2026-02-13 12:00 |
07:33:27.06 |
+04:20:19.1 |
HIP 36884 |
23.83 |
| 2026-02-14 00:00 |
07:33:25.88 |
+04:20:24.5 |
HIP 36884 |
24.09 |
| 2026-02-14 12:00 |
07:33:24.70 |
+04:20:30.0 |
HIP 36884 |
24.35 |
| 2026-02-15 00:00 |
07:33:23.53 |
+04:20:35.6 |
HIP 36884 |
24.61 |
| 2026-02-15 12:00 |
07:33:22.37 |
+04:20:41.1 |
HIP 36884 |
24.87 |
| 2026-02-16 00:00 |
07:33:21.22 |
+04:20:46.7 |
HIP 36884 |
25.13 |
| 2026-02-16 12:00 |
07:33:20.07 |
+04:20:52.3 |
HIP 36884 |
25.39 |
| 2026-02-17 00:00 |
07:33:18.94 |
+04:20:57.9 |
HIP 36884 |
25.64 |
| 2026-02-17 12:00 |
07:33:17.80 |
+04:21:03.6 |
HIP 36884 |
25.90 |
| 2026-02-18 00:00 |
07:33:16.68 |
+04:21:09.3 |
HIP 36884 |
26.16 |
| 2026-02-18 12:00 |
07:33:15.56 |
+04:21:15.0 |
HIP 36884 |
26.41 |
| 2026-02-19 00:00 |
07:33:14.45 |
+04:21:20.7 |
HIP 36884 |
26.66 |
| 2026-02-19 12:00 |
07:33:13.35 |
+04:21:26.5 |
HIP 36884 |
26.92 |
| 2026-02-20 00:00 |
07:33:12.25 |
+04:21:32.2 |
HIP 36884 |
27.17 |
| 2026-02-20 12:00 |
07:33:11.17 |
+04:21:38.1 |
HIP 36884 |
27.42 |
| 2026-02-21 00:00 |
07:33:10.09 |
+04:21:43.9 |
HIP 36884 |
27.67 |
| 2026-02-21 12:00 |
07:33:09.02 |
+04:21:49.7 |
HIP 36884 |
27.91 |
| 2026-02-22 00:00 |
07:33:07.95 |
+04:21:55.6 |
HIP 36884 |
28.16 |
| 2026-02-22 12:00 |
07:33:06.90 |
+04:22:01.5 |
HIP 36884 |
28.40 |
| 2026-02-23 00:00 |
07:33:05.85 |
+04:22:07.4 |
HIP 36884 |
28.65 |
| 2026-02-23 12:00 |
07:33:04.81 |
+04:22:13.3 |
HIP 36884 |
28.89 |
| 2026-02-24 00:00 |
07:33:03.78 |
+04:22:19.3 |
HIP 36884 |
29.13 |