| 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 |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
07:32:59.61 |
+04:37:50.8 |
HIP 36693 |
24.37 |
| 2026-06-01 12:00 |
07:33:00.55 |
+04:37:51.9 |
HIP 36693 |
24.37 |
| 2026-06-02 00:00 |
07:33:01.50 |
+04:37:53.1 |
HIP 36693 |
24.37 |
| 2026-06-02 12:00 |
07:33:02.45 |
+04:37:54.1 |
HIP 36693 |
24.37 |
| 2026-06-03 00:00 |
07:33:03.41 |
+04:37:55.1 |
HIP 36693 |
24.38 |
| 2026-06-03 12:00 |
07:33:04.38 |
+04:37:56.1 |
HIP 36693 |
24.40 |
| 2026-06-04 00:00 |
07:33:05.36 |
+04:37:57.0 |
HIP 36693 |
24.41 |
| 2026-06-04 12:00 |
07:33:06.34 |
+04:37:57.8 |
HIP 36693 |
24.43 |
| 2026-06-05 00:00 |
07:33:07.33 |
+04:37:58.6 |
HIP 36693 |
24.45 |
| 2026-06-05 12:00 |
07:33:08.32 |
+04:37:59.4 |
HIP 36693 |
24.48 |
| 2026-06-06 00:00 |
07:33:09.33 |
+04:38:00.1 |
HIP 36693 |
24.51 |
| 2026-06-06 12:00 |
07:33:10.33 |
+04:38:00.7 |
HIP 36693 |
24.54 |
| 2026-06-07 00:00 |
07:33:11.35 |
+04:38:01.3 |
HIP 36693 |
24.58 |
| 2026-06-07 12:00 |
07:33:12.37 |
+04:38:01.8 |
HIP 36693 |
24.62 |
| 2026-06-08 00:00 |
07:33:13.40 |
+04:38:02.3 |
HIP 36693 |
24.67 |
| 2026-06-08 12:00 |
07:33:14.43 |
+04:38:02.7 |
HIP 36693 |
24.72 |
| 2026-06-09 00:00 |
07:33:15.47 |
+04:38:03.0 |
HIP 36693 |
24.77 |
| 2026-06-09 12:00 |
07:33:16.51 |
+04:38:03.3 |
HIP 36693 |
24.82 |
| 2026-06-10 00:00 |
07:33:17.56 |
+04:38:03.6 |
HIP 36693 |
24.89 |
| 2026-06-10 12:00 |
07:33:18.62 |
+04:38:03.8 |
HIP 36693 |
24.95 |
| 2026-06-11 00:00 |
07:33:19.68 |
+04:38:03.9 |
HIP 36693 |
25.02 |
| 2026-06-11 12:00 |
07:33:20.75 |
+04:38:04.0 |
HIP 36693 |
25.09 |
| 2026-06-12 00:00 |
07:33:21.83 |
+04:38:04.0 |
HIP 36693 |
25.17 |
| 2026-06-12 12:00 |
07:33:22.91 |
+04:38:04.0 |
HIP 36693 |
25.24 |
| 2026-06-13 00:00 |
07:33:23.99 |
+04:38:03.9 |
HIP 36693 |
25.33 |
| 2026-06-13 12:00 |
07:33:25.08 |
+04:38:03.8 |
HIP 36693 |
25.42 |
| 2026-06-14 00:00 |
07:33:26.18 |
+04:38:03.6 |
HIP 36693 |
25.51 |
| 2026-06-14 12:00 |
07:33:27.28 |
+04:38:03.4 |
HIP 36693 |
25.60 |
| 2026-06-15 00:00 |
07:33:28.39 |
+04:38:03.1 |
HIP 36884 |
25.54 |
| 2026-06-15 12:00 |
07:33:29.50 |
+04:38:02.7 |
HIP 36884 |
25.29 |
| 2026-06-16 00:00 |
07:33:30.62 |
+04:38:02.3 |
HIP 36884 |
25.04 |
| 2026-06-16 12:00 |
07:33:31.74 |
+04:38:01.8 |
HIP 36884 |
24.79 |
| 2026-06-17 00:00 |
07:33:32.86 |
+04:38:01.3 |
HIP 36884 |
24.54 |
| 2026-06-17 12:00 |
07:33:33.99 |
+04:38:00.7 |
HIP 36884 |
24.28 |
| 2026-06-18 00:00 |
07:33:35.13 |
+04:38:00.1 |
HIP 36884 |
24.03 |
| 2026-06-18 12:00 |
07:33:36.27 |
+04:37:59.4 |
HIP 36884 |
23.78 |
| 2026-06-19 00:00 |
07:33:37.41 |
+04:37:58.7 |
HIP 36884 |
23.52 |
| 2026-06-19 12:00 |
07:33:38.56 |
+04:37:57.9 |
HIP 36884 |
23.27 |
| 2026-06-20 00:00 |
07:33:39.71 |
+04:37:57.0 |
HIP 36884 |
23.01 |
| 2026-06-20 12:00 |
07:33:40.87 |
+04:37:56.1 |
HIP 36884 |
22.75 |
| 2026-06-21 00:00 |
07:33:42.03 |
+04:37:55.1 |
HIP 36884 |
22.50 |
| 2026-06-21 12:00 |
07:33:43.20 |
+04:37:54.1 |
HIP 36884 |
22.24 |
| 2026-06-22 00:00 |
07:33:44.37 |
+04:37:53.1 |
HIP 36884 |
21.98 |