| 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) |
| 2026-06-01 00:00 |
09:06:18.75 |
-24:58:01.6 |
HIP 44660 |
9.40 |
| 2026-06-01 12:00 |
09:06:19.77 |
-24:57:43.8 |
HIP 44660 |
9.77 |
| 2026-06-02 00:00 |
09:06:20.81 |
-24:57:26.2 |
HIP 44660 |
10.13 |
| 2026-06-02 12:00 |
09:06:21.87 |
-24:57:08.8 |
HIP 44660 |
10.50 |
| 2026-06-03 00:00 |
09:06:22.94 |
-24:56:51.5 |
HIP 44660 |
10.87 |
| 2026-06-03 12:00 |
09:06:24.04 |
-24:56:34.4 |
HIP 44660 |
11.24 |
| 2026-06-04 00:00 |
09:06:25.16 |
-24:56:17.4 |
HIP 44660 |
11.61 |
| 2026-06-04 12:00 |
09:06:26.29 |
-24:56:00.7 |
HIP 44660 |
11.98 |
| 2026-06-05 00:00 |
09:06:27.45 |
-24:55:44.0 |
HIP 44660 |
12.34 |
| 2026-06-05 12:00 |
09:06:28.62 |
-24:55:27.6 |
HIP 44660 |
12.71 |
| 2026-06-06 00:00 |
09:06:29.81 |
-24:55:11.3 |
HIP 44660 |
13.08 |
| 2026-06-06 12:00 |
09:06:31.02 |
-24:54:55.2 |
HIP 44660 |
13.46 |
| 2026-06-07 00:00 |
09:06:32.25 |
-24:54:39.3 |
HIP 44660 |
13.83 |
| 2026-06-07 12:00 |
09:06:33.50 |
-24:54:23.5 |
HIP 44660 |
14.20 |
| 2026-06-08 00:00 |
09:06:34.77 |
-24:54:07.9 |
HIP 44660 |
14.57 |
| 2026-06-08 12:00 |
09:06:36.06 |
-24:53:52.5 |
HIP 44660 |
14.94 |
| 2026-06-09 00:00 |
09:06:37.36 |
-24:53:37.3 |
HIP 44660 |
15.32 |
| 2026-06-09 12:00 |
09:06:38.68 |
-24:53:22.2 |
HIP 44660 |
15.69 |
| 2026-06-10 00:00 |
09:06:40.02 |
-24:53:07.3 |
HIP 44660 |
16.06 |
| 2026-06-10 12:00 |
09:06:41.38 |
-24:52:52.6 |
HIP 44660 |
16.44 |
| 2026-06-11 00:00 |
09:06:42.75 |
-24:52:38.1 |
HIP 44660 |
16.81 |
| 2026-06-11 12:00 |
09:06:44.15 |
-24:52:23.8 |
HIP 44660 |
17.19 |
| 2026-06-12 00:00 |
09:06:45.56 |
-24:52:09.6 |
HIP 44660 |
17.57 |
| 2026-06-12 12:00 |
09:06:46.98 |
-24:51:55.6 |
HIP 44660 |
17.94 |
| 2026-06-13 00:00 |
09:06:48.43 |
-24:51:41.9 |
HIP 44660 |
18.32 |
| 2026-06-13 12:00 |
09:06:49.89 |
-24:51:28.3 |
HIP 44660 |
18.70 |
| 2026-06-14 00:00 |
09:06:51.37 |
-24:51:14.9 |
HIP 44660 |
19.08 |
| 2026-06-14 12:00 |
09:06:52.87 |
-24:51:01.6 |
HIP 44660 |
19.46 |
| 2026-06-15 00:00 |
09:06:54.38 |
-24:50:48.6 |
HIP 44660 |
19.84 |
| 2026-06-15 12:00 |
09:06:55.91 |
-24:50:35.8 |
HIP 44660 |
20.23 |
| 2026-06-16 00:00 |
09:06:57.46 |
-24:50:23.1 |
HIP 44660 |
20.61 |
| 2026-06-16 12:00 |
09:06:59.03 |
-24:50:10.6 |
HIP 44660 |
20.99 |
| 2026-06-17 00:00 |
09:07:00.61 |
-24:49:58.4 |
HIP 44660 |
21.38 |
| 2026-06-17 12:00 |
09:07:02.20 |
-24:49:46.3 |
HIP 44660 |
21.76 |
| 2026-06-18 00:00 |
09:07:03.81 |
-24:49:34.4 |
HIP 44660 |
22.15 |
| 2026-06-18 12:00 |
09:07:05.44 |
-24:49:22.7 |
HIP 44660 |
22.54 |
| 2026-06-19 00:00 |
09:07:07.09 |
-24:49:11.3 |
HIP 44660 |
22.93 |
| 2026-06-19 12:00 |
09:07:08.75 |
-24:49:00.0 |
HIP 44660 |
23.32 |
| 2026-06-20 00:00 |
09:07:10.42 |
-24:48:48.9 |
HIP 44660 |
23.71 |
| 2026-06-20 12:00 |
09:07:12.11 |
-24:48:38.0 |
HIP 44660 |
24.10 |
| 2026-06-21 00:00 |
09:07:13.82 |
-24:48:27.3 |
HIP 44660 |
24.49 |
| 2026-06-21 12:00 |
09:07:15.54 |
-24:48:16.8 |
HIP 44660 |
24.88 |
| 2026-06-22 00:00 |
09:07:17.27 |
-24:48:06.5 |
HIP 44660 |
25.28 |