C/1962 H1 (Honda)
| 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 |
-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) |
| 2026-02-03 00:00 |
21:35:34.78 |
-77:01:00.0 |
HIP 106391 |
11.51 |
| 2026-02-03 12:00 |
21:35:40.44 |
-77:00:54.6 |
HIP 106391 |
11.71 |
| 2026-02-04 00:00 |
21:35:46.12 |
-77:00:49.5 |
HIP 106391 |
11.92 |
| 2026-02-04 12:00 |
21:35:51.79 |
-77:00:44.5 |
HIP 106391 |
12.14 |
| 2026-02-05 00:00 |
21:35:57.48 |
-77:00:39.6 |
HIP 106391 |
12.36 |
| 2026-02-05 12:00 |
21:36:03.16 |
-77:00:34.9 |
HIP 106391 |
12.59 |
| 2026-02-06 00:00 |
21:36:08.85 |
-77:00:30.3 |
HIP 106391 |
12.82 |
| 2026-02-06 12:00 |
21:36:14.54 |
-77:00:25.9 |
HIP 106391 |
13.06 |
| 2026-02-07 00:00 |
21:36:20.24 |
-77:00:21.6 |
HIP 106391 |
13.30 |
| 2026-02-07 12:00 |
21:36:25.94 |
-77:00:17.4 |
HIP 106391 |
13.55 |
| 2026-02-08 00:00 |
21:36:31.64 |
-77:00:13.4 |
HIP 106391 |
13.81 |
| 2026-02-08 12:00 |
21:36:37.34 |
-77:00:09.6 |
HIP 107045 |
14.05 |
| 2026-02-09 00:00 |
21:36:43.05 |
-77:00:05.9 |
HIP 107045 |
13.74 |
| 2026-02-09 12:00 |
21:36:48.75 |
-77:00:02.3 |
HIP 107045 |
13.42 |
| 2026-02-10 00:00 |
21:36:54.46 |
-76:59:58.9 |
HIP 107045 |
13.11 |
| 2026-02-10 12:00 |
21:37:00.17 |
-76:59:55.6 |
HIP 107045 |
12.79 |
| 2026-02-11 00:00 |
21:37:05.87 |
-76:59:52.5 |
HIP 107045 |
12.48 |
| 2026-02-11 12:00 |
21:37:11.58 |
-76:59:49.5 |
HIP 107045 |
12.16 |
| 2026-02-12 00:00 |
21:37:17.28 |
-76:59:46.7 |
HIP 107045 |
11.85 |
| 2026-02-12 12:00 |
21:37:22.99 |
-76:59:44.0 |
HIP 107045 |
11.53 |
| 2026-02-13 00:00 |
21:37:28.69 |
-76:59:41.5 |
HIP 107045 |
11.22 |
| 2026-02-13 12:00 |
21:37:34.39 |
-76:59:39.1 |
HIP 107045 |
10.90 |
| 2026-02-14 00:00 |
21:37:40.09 |
-76:59:36.9 |
HIP 107045 |
10.59 |
| 2026-02-14 12:00 |
21:37:45.79 |
-76:59:34.8 |
HIP 107045 |
10.28 |
| 2026-02-15 00:00 |
21:37:51.48 |
-76:59:32.9 |
HIP 107045 |
9.97 |
| 2026-02-15 12:00 |
21:37:57.17 |
-76:59:31.1 |
HIP 107045 |
9.65 |
| 2026-02-16 00:00 |
21:38:02.86 |
-76:59:29.5 |
HIP 107045 |
9.34 |
| 2026-02-16 12:00 |
21:38:08.54 |
-76:59:28.0 |
HIP 107045 |
9.03 |
| 2026-02-17 00:00 |
21:38:14.22 |
-76:59:26.7 |
HIP 107045 |
8.72 |
| 2026-02-17 12:00 |
21:38:19.89 |
-76:59:25.5 |
HIP 107045 |
8.41 |
| 2026-02-18 00:00 |
21:38:25.55 |
-76:59:24.5 |
HIP 107045 |
8.10 |
| 2026-02-18 12:00 |
21:38:31.21 |
-76:59:23.6 |
HIP 107045 |
7.79 |
| 2026-02-19 00:00 |
21:38:36.87 |
-76:59:22.9 |
HIP 107045 |
7.48 |
| 2026-02-19 12:00 |
21:38:42.52 |
-76:59:22.3 |
HIP 107045 |
7.17 |
| 2026-02-20 00:00 |
21:38:48.16 |
-76:59:21.9 |
HIP 107045 |
6.87 |
| 2026-02-20 12:00 |
21:38:53.79 |
-76:59:21.7 |
HIP 107045 |
6.56 |
| 2026-02-21 00:00 |
21:38:59.42 |
-76:59:21.5 |
HIP 107045 |
6.25 |
| 2026-02-21 12:00 |
21:39:05.04 |
-76:59:21.6 |
HIP 107045 |
5.95 |
| 2026-02-22 00:00 |
21:39:10.64 |
-76:59:21.7 |
HIP 107045 |
5.64 |
| 2026-02-22 12:00 |
21:39:16.24 |
-76:59:22.1 |
HIP 107045 |
5.34 |
| 2026-02-23 00:00 |
21:39:21.84 |
-76:59:22.6 |
HIP 107045 |
5.04 |
| 2026-02-23 12:00 |
21:39:27.42 |
-76:59:23.2 |
HIP 107045 |
4.74 |
| 2026-02-24 00:00 |
21:39:32.99 |
-76:59:24.0 |
HIP 107045 |
4.44 |