| Parameter |
Value |
| Designation |
C/1962 H1 (Honda) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1962-04-20T04:45:37.388160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:16Z |
| Obs used |
11 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1962-05-12.0000000 |
| e |
1.00000000 |
| q (au) |
0.653085 |
| a (au) |
- |
| i (deg) |
72.872963 |
| Ω (om, deg) |
79.819214 |
| ω (w, deg) |
72.139524 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (10.001 + 5.008\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.001 |
| n |
5.008 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-07-29 00:00 |
21:40:54.68 |
-78:06:15.7 |
HIP 107782 |
29.16 |
| 2026-07-29 12:00 |
21:40:49.00 |
-78:06:23.5 |
HIP 107782 |
29.41 |
| 2026-07-30 00:00 |
21:40:43.30 |
-78:06:31.2 |
HIP 107782 |
29.66 |
| 2026-07-30 12:00 |
21:40:37.59 |
-78:06:38.7 |
HIP 107782 |
29.91 |
| 2026-07-31 00:00 |
21:40:31.86 |
-78:06:46.1 |
HIP 107782 |
30.17 |
| 2026-07-31 12:00 |
21:40:26.12 |
-78:06:53.3 |
HIP 107782 |
30.43 |
| 2026-08-01 00:00 |
21:40:20.36 |
-78:07:00.4 |
HIP 107782 |
30.69 |
| 2026-08-01 12:00 |
21:40:14.59 |
-78:07:07.3 |
HIP 107782 |
30.96 |
| 2026-08-02 00:00 |
21:40:08.81 |
-78:07:14.1 |
HIP 107782 |
31.22 |
| 2026-08-02 12:00 |
21:40:03.01 |
-78:07:20.8 |
HIP 107782 |
31.49 |
| 2026-08-03 00:00 |
21:39:57.20 |
-78:07:27.3 |
HIP 107782 |
31.76 |
| 2026-08-03 12:00 |
21:39:51.38 |
-78:07:33.7 |
HIP 107782 |
32.03 |
| 2026-08-04 00:00 |
21:39:45.54 |
-78:07:39.9 |
HIP 106406 |
32.05 |
| 2026-08-04 12:00 |
21:39:39.70 |
-78:07:45.9 |
HIP 106406 |
31.79 |
| 2026-08-05 00:00 |
21:39:33.84 |
-78:07:51.8 |
HIP 106406 |
31.52 |
| 2026-08-05 12:00 |
21:39:27.97 |
-78:07:57.6 |
HIP 106406 |
31.26 |
| 2026-08-06 00:00 |
21:39:22.09 |
-78:08:03.2 |
HIP 106406 |
31.01 |
| 2026-08-06 12:00 |
21:39:16.21 |
-78:08:08.6 |
HIP 106406 |
30.75 |
| 2026-08-07 00:00 |
21:39:10.31 |
-78:08:13.9 |
HIP 106406 |
30.50 |
| 2026-08-07 12:00 |
21:39:04.40 |
-78:08:19.1 |
HIP 106406 |
30.25 |
| 2026-08-08 00:00 |
21:38:58.49 |
-78:08:24.1 |
HIP 106406 |
30.01 |
| 2026-08-08 12:00 |
21:38:52.57 |
-78:08:28.9 |
HIP 106406 |
29.77 |
| 2026-08-09 00:00 |
21:38:46.64 |
-78:08:33.6 |
HIP 106406 |
29.53 |
| 2026-08-09 12:00 |
21:38:40.71 |
-78:08:38.1 |
HIP 106406 |
29.29 |
| 2026-08-10 00:00 |
21:38:34.76 |
-78:08:42.5 |
HIP 106406 |
29.06 |
| 2026-08-10 12:00 |
21:38:28.82 |
-78:08:46.7 |
HIP 106406 |
28.83 |
| 2026-08-11 00:00 |
21:38:22.87 |
-78:08:50.7 |
HIP 106406 |
28.61 |
| 2026-08-11 12:00 |
21:38:16.91 |
-78:08:54.7 |
HIP 106406 |
28.39 |
| 2026-08-12 00:00 |
21:38:10.95 |
-78:08:58.4 |
HIP 106406 |
28.17 |
| 2026-08-12 12:00 |
21:38:04.98 |
-78:09:02.0 |
HIP 106406 |
27.96 |
| 2026-08-13 00:00 |
21:37:59.02 |
-78:09:05.4 |
HIP 106406 |
27.75 |
| 2026-08-13 12:00 |
21:37:53.05 |
-78:09:08.7 |
HIP 106406 |
27.54 |
| 2026-08-14 00:00 |
21:37:47.08 |
-78:09:11.8 |
HIP 106406 |
27.34 |
| 2026-08-14 12:00 |
21:37:41.10 |
-78:09:14.8 |
HIP 106406 |
27.14 |
| 2026-08-15 00:00 |
21:37:35.13 |
-78:09:17.6 |
HIP 106406 |
26.95 |
| 2026-08-15 12:00 |
21:37:29.16 |
-78:09:20.2 |
HIP 106406 |
26.76 |
| 2026-08-16 00:00 |
21:37:23.18 |
-78:09:22.7 |
HIP 106406 |
26.57 |
| 2026-08-16 12:00 |
21:37:17.21 |
-78:09:25.0 |
HIP 106406 |
26.39 |
| 2026-08-17 00:00 |
21:37:11.24 |
-78:09:27.2 |
HIP 106406 |
26.22 |
| 2026-08-17 12:00 |
21:37:05.27 |
-78:09:29.2 |
HIP 106406 |
26.05 |
| 2026-08-18 00:00 |
21:36:59.30 |
-78:09:31.0 |
HIP 106406 |
25.88 |
| 2026-08-18 12:00 |
21:36:53.34 |
-78:09:32.7 |
HIP 106406 |
25.72 |
| 2026-08-19 00:00 |
21:36:47.38 |
-78:09:34.2 |
HIP 106406 |
25.57 |