C/1932 H1 (Carrasco)
| Parameter |
Value |
| Designation |
C/1932 H1 (Carrasco) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1931-11-29T19:41:48.048000Z |
| Orbit solution date (soln_date, UTC) |
2023-12-05T08:04:21Z |
| Obs used |
6 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1932-04-30.0000000 |
| e |
1.00010577 |
| q (au) |
2.318385 |
| a (au) |
-21919.100180 |
| i (deg) |
58.083496 |
| Ω (om, deg) |
18.797874 |
| ω (w, deg) |
109.807035 |
| M (ma, deg) |
0.000046 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.489 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.489 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.598 |
| 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 |
22:21:52.87 |
-75:03:29.9 |
HIP 110364 |
6.05 |
| 2026-02-03 12:00 |
22:21:56.52 |
-75:03:22.5 |
HIP 110364 |
6.04 |
| 2026-02-04 00:00 |
22:22:00.18 |
-75:03:15.2 |
HIP 110364 |
6.06 |
| 2026-02-04 12:00 |
22:22:03.86 |
-75:03:08.0 |
HIP 110364 |
6.08 |
| 2026-02-05 00:00 |
22:22:07.54 |
-75:03:00.9 |
HIP 110364 |
6.12 |
| 2026-02-05 12:00 |
22:22:11.23 |
-75:02:53.9 |
HIP 110364 |
6.17 |
| 2026-02-06 00:00 |
22:22:14.93 |
-75:02:47.0 |
HIP 110364 |
6.23 |
| 2026-02-06 12:00 |
22:22:18.63 |
-75:02:40.3 |
HIP 110364 |
6.31 |
| 2026-02-07 00:00 |
22:22:22.35 |
-75:02:33.6 |
HIP 110364 |
6.40 |
| 2026-02-07 12:00 |
22:22:26.08 |
-75:02:27.0 |
HIP 110364 |
6.50 |
| 2026-02-08 00:00 |
22:22:29.81 |
-75:02:20.6 |
HIP 110364 |
6.60 |
| 2026-02-08 12:00 |
22:22:33.55 |
-75:02:14.3 |
HIP 110364 |
6.72 |
| 2026-02-09 00:00 |
22:22:37.30 |
-75:02:08.1 |
HIP 110364 |
6.85 |
| 2026-02-09 12:00 |
22:22:41.05 |
-75:02:01.9 |
HIP 110364 |
6.99 |
| 2026-02-10 00:00 |
22:22:44.82 |
-75:01:56.0 |
HIP 110364 |
7.14 |
| 2026-02-10 12:00 |
22:22:48.59 |
-75:01:50.1 |
HIP 110364 |
7.30 |
| 2026-02-11 00:00 |
22:22:52.36 |
-75:01:44.3 |
HIP 110364 |
7.46 |
| 2026-02-11 12:00 |
22:22:56.15 |
-75:01:38.7 |
HIP 110364 |
7.63 |
| 2026-02-12 00:00 |
22:22:59.94 |
-75:01:33.1 |
HIP 110364 |
7.80 |
| 2026-02-12 12:00 |
22:23:03.73 |
-75:01:27.7 |
HIP 110364 |
7.98 |
| 2026-02-13 00:00 |
22:23:07.53 |
-75:01:22.4 |
HIP 110364 |
8.17 |
| 2026-02-13 12:00 |
22:23:11.34 |
-75:01:17.2 |
HIP 110364 |
8.36 |
| 2026-02-14 00:00 |
22:23:15.15 |
-75:01:12.1 |
HIP 110364 |
8.56 |
| 2026-02-14 12:00 |
22:23:18.96 |
-75:01:07.2 |
HIP 110364 |
8.76 |
| 2026-02-15 00:00 |
22:23:22.78 |
-75:01:02.3 |
HIP 110364 |
8.97 |
| 2026-02-15 12:00 |
22:23:26.60 |
-75:00:57.6 |
HIP 110364 |
9.18 |
| 2026-02-16 00:00 |
22:23:30.43 |
-75:00:53.0 |
HIP 110712 |
9.09 |
| 2026-02-16 12:00 |
22:23:34.26 |
-75:00:48.5 |
HIP 110712 |
8.84 |
| 2026-02-17 00:00 |
22:23:38.10 |
-75:00:44.2 |
HIP 110712 |
8.60 |
| 2026-02-17 12:00 |
22:23:41.94 |
-75:00:39.9 |
HIP 110712 |
8.35 |
| 2026-02-18 00:00 |
22:23:45.78 |
-75:00:35.8 |
HIP 110712 |
8.10 |
| 2026-02-18 12:00 |
22:23:49.62 |
-75:00:31.8 |
HIP 110712 |
7.86 |
| 2026-02-19 00:00 |
22:23:53.46 |
-75:00:27.9 |
HIP 110712 |
7.62 |
| 2026-02-19 12:00 |
22:23:57.31 |
-75:00:24.1 |
HIP 110712 |
7.37 |
| 2026-02-20 00:00 |
22:24:01.16 |
-75:00:20.5 |
HIP 110712 |
7.13 |
| 2026-02-20 12:00 |
22:24:05.01 |
-75:00:16.9 |
HIP 110712 |
6.89 |
| 2026-02-21 00:00 |
22:24:08.86 |
-75:00:13.5 |
HIP 110712 |
6.65 |
| 2026-02-21 12:00 |
22:24:12.71 |
-75:00:10.2 |
HIP 110712 |
6.40 |
| 2026-02-22 00:00 |
22:24:16.56 |
-75:00:07.1 |
HIP 110712 |
6.16 |
| 2026-02-22 12:00 |
22:24:20.41 |
-75:00:04.0 |
HIP 110712 |
5.92 |
| 2026-02-23 00:00 |
22:24:24.27 |
-75:00:01.1 |
HIP 110712 |
5.69 |
| 2026-02-23 12:00 |
22:24:28.12 |
-74:59:58.3 |
HIP 110712 |
5.45 |
| 2026-02-24 00:00 |
22:24:31.97 |
-74:59:55.6 |
HIP 110712 |
5.21 |