C/2000 H1 (LINEAR)
| Parameter |
Value |
| Designation |
C/2000 H1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-01-29T06:37:45.935040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-06-10.0000000 |
| e |
1.00207029 |
| q (au) |
3.638124 |
| a (au) |
-1757.299516 |
| i (deg) |
118.236996 |
| Ω (om, deg) |
356.443281 |
| ω (w, deg) |
78.874677 |
| M (ma, deg) |
0.001776 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.510 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.510 |
| n |
6.000 |
| 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) |
| 2026-02-03 00:00 |
09:11:48.55 |
-26:20:10.8 |
HIP 45044 |
18.17 |
| 2026-02-03 12:00 |
09:11:45.57 |
-26:20:04.1 |
HIP 45044 |
17.49 |
| 2026-02-04 00:00 |
09:11:42.60 |
-26:19:57.1 |
HIP 45044 |
16.81 |
| 2026-02-04 12:00 |
09:11:39.63 |
-26:19:49.9 |
HIP 45044 |
16.14 |
| 2026-02-05 00:00 |
09:11:36.65 |
-26:19:42.4 |
HIP 45044 |
15.46 |
| 2026-02-05 12:00 |
09:11:33.68 |
-26:19:34.8 |
HIP 45044 |
14.78 |
| 2026-02-06 00:00 |
09:11:30.70 |
-26:19:26.9 |
HIP 45044 |
14.10 |
| 2026-02-06 12:00 |
09:11:27.73 |
-26:19:18.7 |
HIP 45044 |
13.42 |
| 2026-02-07 00:00 |
09:11:24.76 |
-26:19:10.3 |
HIP 45044 |
12.74 |
| 2026-02-07 12:00 |
09:11:21.79 |
-26:19:01.7 |
HIP 45044 |
12.06 |
| 2026-02-08 00:00 |
09:11:18.82 |
-26:18:52.9 |
HIP 45044 |
11.38 |
| 2026-02-08 12:00 |
09:11:15.85 |
-26:18:43.8 |
HIP 45044 |
10.70 |
| 2026-02-09 00:00 |
09:11:12.89 |
-26:18:34.5 |
HIP 45044 |
10.03 |
| 2026-02-09 12:00 |
09:11:09.92 |
-26:18:24.9 |
HIP 45044 |
9.35 |
| 2026-02-10 00:00 |
09:11:06.96 |
-26:18:15.1 |
HIP 45044 |
8.67 |
| 2026-02-10 12:00 |
09:11:04.00 |
-26:18:05.1 |
HIP 45044 |
7.99 |
| 2026-02-11 00:00 |
09:11:01.04 |
-26:17:54.9 |
HIP 45044 |
7.31 |
| 2026-02-11 12:00 |
09:10:58.09 |
-26:17:44.4 |
HIP 45044 |
6.64 |
| 2026-02-12 00:00 |
09:10:55.14 |
-26:17:33.7 |
HIP 45044 |
5.97 |
| 2026-02-12 12:00 |
09:10:52.19 |
-26:17:22.8 |
HIP 45044 |
5.30 |
| 2026-02-13 00:00 |
09:10:49.25 |
-26:17:11.6 |
HIP 45044 |
4.64 |
| 2026-02-13 12:00 |
09:10:46.31 |
-26:17:00.3 |
HIP 45044 |
3.98 |
| 2026-02-14 00:00 |
09:10:43.38 |
-26:16:48.7 |
HIP 45044 |
3.34 |
| 2026-02-14 12:00 |
09:10:40.44 |
-26:16:36.8 |
HIP 45044 |
2.73 |
| 2026-02-15 00:00 |
09:10:37.52 |
-26:16:24.8 |
HIP 45044 |
2.16 |
| 2026-02-15 12:00 |
09:10:34.60 |
-26:16:12.5 |
HIP 45044 |
1.68 |
| 2026-02-16 00:00 |
09:10:31.68 |
-26:16:00.1 |
HIP 45044 |
1.40 |
| 2026-02-16 12:00 |
09:10:28.77 |
-26:15:47.4 |
HIP 45044 |
1.42 |
| 2026-02-17 00:00 |
09:10:25.86 |
-26:15:34.5 |
HIP 45044 |
1.75 |
| 2026-02-17 12:00 |
09:10:22.96 |
-26:15:21.3 |
HIP 45044 |
2.24 |
| 2026-02-18 00:00 |
09:10:20.07 |
-26:15:08.0 |
HIP 45044 |
2.82 |
| 2026-02-18 12:00 |
09:10:17.18 |
-26:14:54.4 |
HIP 45044 |
3.44 |
| 2026-02-19 00:00 |
09:10:14.30 |
-26:14:40.7 |
HIP 45044 |
4.08 |
| 2026-02-19 12:00 |
09:10:11.43 |
-26:14:26.7 |
HIP 45044 |
4.74 |
| 2026-02-20 00:00 |
09:10:08.56 |
-26:14:12.5 |
HIP 45044 |
5.40 |
| 2026-02-20 12:00 |
09:10:05.70 |
-26:13:58.1 |
HIP 45044 |
6.07 |
| 2026-02-21 00:00 |
09:10:02.85 |
-26:13:43.5 |
HIP 45044 |
6.74 |
| 2026-02-21 12:00 |
09:10:00.01 |
-26:13:28.7 |
HIP 45044 |
7.41 |
| 2026-02-22 00:00 |
09:09:57.17 |
-26:13:13.7 |
HIP 45044 |
8.09 |
| 2026-02-22 12:00 |
09:09:54.34 |
-26:12:58.5 |
HIP 45044 |
8.77 |
| 2026-02-23 00:00 |
09:09:51.52 |
-26:12:43.1 |
HIP 45044 |
9.45 |
| 2026-02-23 12:00 |
09:09:48.71 |
-26:12:27.5 |
HIP 45044 |
10.12 |
| 2026-02-24 00:00 |
09:09:45.91 |
-26:12:11.7 |
HIP 45044 |
10.80 |