C/2000 D2 (LINEAR)
| Parameter |
Value |
| Designation |
C/2000 D2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-03-08T14:43:54.082560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
79 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-03-01.0000000 |
| e |
0.86703438 |
| q (au) |
2.297610 |
| a (au) |
17.279730 |
| i (deg) |
156.991926 |
| Ω (om, deg) |
235.887153 |
| ω (w, deg) |
117.682679 |
| M (ma, deg) |
359.895528 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.087 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.087 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
20:52:46.87 |
-39:16:11.6 |
HIP 103049 |
9.70 |
| 2026-02-03 12:00 |
20:52:51.26 |
-39:15:58.9 |
HIP 103049 |
9.59 |
| 2026-02-04 00:00 |
20:52:55.66 |
-39:15:46.3 |
HIP 103049 |
9.57 |
| 2026-02-04 12:00 |
20:53:00.05 |
-39:15:33.9 |
HIP 103049 |
9.62 |
| 2026-02-05 00:00 |
20:53:04.43 |
-39:15:21.7 |
HIP 103049 |
9.76 |
| 2026-02-05 12:00 |
20:53:08.82 |
-39:15:09.7 |
HIP 103049 |
9.97 |
| 2026-02-06 00:00 |
20:53:13.20 |
-39:14:57.8 |
HIP 103049 |
10.26 |
| 2026-02-06 12:00 |
20:53:17.57 |
-39:14:46.2 |
HIP 103049 |
10.61 |
| 2026-02-07 00:00 |
20:53:21.94 |
-39:14:34.7 |
HIP 103049 |
11.03 |
| 2026-02-07 12:00 |
20:53:26.31 |
-39:14:23.4 |
HIP 103049 |
11.49 |
| 2026-02-08 00:00 |
20:53:30.67 |
-39:14:12.3 |
HIP 103049 |
12.00 |
| 2026-02-08 12:00 |
20:53:35.03 |
-39:14:01.4 |
HIP 103049 |
12.55 |
| 2026-02-09 00:00 |
20:53:39.38 |
-39:13:50.7 |
HIP 103049 |
13.13 |
| 2026-02-09 12:00 |
20:53:43.72 |
-39:13:40.1 |
HIP 103049 |
13.75 |
| 2026-02-10 00:00 |
20:53:48.06 |
-39:13:29.8 |
HIP 103049 |
14.39 |
| 2026-02-10 12:00 |
20:53:52.39 |
-39:13:19.6 |
HIP 103049 |
15.05 |
| 2026-02-11 00:00 |
20:53:56.71 |
-39:13:09.7 |
HIP 103049 |
15.73 |
| 2026-02-11 12:00 |
20:54:01.03 |
-39:12:59.9 |
HIP 103049 |
16.43 |
| 2026-02-12 00:00 |
20:54:05.34 |
-39:12:50.3 |
HIP 103049 |
17.14 |
| 2026-02-12 12:00 |
20:54:09.64 |
-39:12:40.9 |
HIP 103049 |
17.87 |
| 2026-02-13 00:00 |
20:54:13.93 |
-39:12:31.8 |
HIP 103049 |
18.60 |
| 2026-02-13 12:00 |
20:54:18.21 |
-39:12:22.8 |
HIP 103049 |
19.34 |
| 2026-02-14 00:00 |
20:54:22.49 |
-39:12:14.0 |
HIP 103049 |
20.09 |
| 2026-02-14 12:00 |
20:54:26.75 |
-39:12:05.4 |
HIP 103049 |
20.85 |
| 2026-02-15 00:00 |
20:54:31.01 |
-39:11:57.0 |
HIP 103049 |
21.61 |
| 2026-02-15 12:00 |
20:54:35.25 |
-39:11:48.8 |
HIP 103049 |
22.37 |
| 2026-02-16 00:00 |
20:54:39.49 |
-39:11:40.8 |
HIP 103049 |
23.14 |
| 2026-02-16 12:00 |
20:54:43.71 |
-39:11:33.0 |
HIP 103049 |
23.91 |
| 2026-02-17 00:00 |
20:54:47.92 |
-39:11:25.4 |
HIP 103049 |
24.69 |
| 2026-02-17 12:00 |
20:54:52.12 |
-39:11:18.1 |
HIP 103049 |
25.46 |
| 2026-02-18 00:00 |
20:54:56.31 |
-39:11:10.9 |
HIP 103049 |
26.24 |
| 2026-02-18 12:00 |
20:55:00.49 |
-39:11:03.9 |
HIP 103049 |
27.02 |
| 2026-02-19 00:00 |
20:55:04.66 |
-39:10:57.1 |
HIP 103049 |
27.80 |
| 2026-02-19 12:00 |
20:55:08.81 |
-39:10:50.6 |
HIP 103049 |
28.57 |
| 2026-02-20 00:00 |
20:55:12.95 |
-39:10:44.2 |
HIP 103049 |
29.35 |
| 2026-02-20 12:00 |
20:55:17.07 |
-39:10:38.1 |
HIP 103049 |
30.13 |
| 2026-02-21 00:00 |
20:55:21.19 |
-39:10:32.1 |
HIP 103049 |
30.91 |
| 2026-02-21 12:00 |
20:55:25.28 |
-39:10:26.4 |
HIP 103049 |
31.68 |
| 2026-02-22 00:00 |
20:55:29.37 |
-39:10:20.9 |
HIP 103049 |
32.46 |
| 2026-02-22 12:00 |
20:55:33.44 |
-39:10:15.6 |
HIP 103504 |
31.79 |
| 2026-02-23 00:00 |
20:55:37.49 |
-39:10:10.4 |
HIP 103504 |
31.01 |
| 2026-02-23 12:00 |
20:55:41.53 |
-39:10:05.5 |
HIP 103504 |
30.23 |
| 2026-02-24 00:00 |
20:55:45.55 |
-39:10:00.9 |
HIP 103504 |
29.45 |