| 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) |
| 2026-09-25 00:00 |
20:42:06.31 |
-40:51:03.9 |
HIP 102227 |
8.34 |
| 2026-09-25 12:00 |
20:42:03.11 |
-40:50:54.1 |
HIP 102227 |
8.96 |
| 2026-09-26 00:00 |
20:41:59.94 |
-40:50:44.1 |
HIP 102227 |
9.57 |
| 2026-09-26 12:00 |
20:41:56.80 |
-40:50:33.9 |
HIP 102227 |
10.18 |
| 2026-09-27 00:00 |
20:41:53.71 |
-40:50:23.5 |
HIP 102227 |
10.78 |
| 2026-09-27 12:00 |
20:41:50.65 |
-40:50:12.8 |
HIP 102227 |
11.38 |
| 2026-09-28 00:00 |
20:41:47.62 |
-40:50:02.0 |
HIP 102227 |
11.97 |
| 2026-09-28 12:00 |
20:41:44.64 |
-40:49:51.0 |
HIP 102227 |
12.55 |
| 2026-09-29 00:00 |
20:41:41.69 |
-40:49:39.8 |
HIP 102227 |
13.13 |
| 2026-09-29 12:00 |
20:41:38.78 |
-40:49:28.3 |
HIP 102227 |
13.70 |
| 2026-09-30 00:00 |
20:41:35.90 |
-40:49:16.7 |
HIP 102227 |
14.27 |
| 2026-09-30 12:00 |
20:41:33.07 |
-40:49:04.9 |
HIP 102227 |
14.83 |
| 2026-10-01 00:00 |
20:41:30.27 |
-40:48:52.8 |
HIP 102227 |
15.39 |
| 2026-10-01 12:00 |
20:41:27.51 |
-40:48:40.6 |
HIP 102063 |
15.03 |
| 2026-10-02 00:00 |
20:41:24.79 |
-40:48:28.2 |
HIP 102063 |
14.67 |
| 2026-10-02 12:00 |
20:41:22.10 |
-40:48:15.5 |
HIP 102063 |
14.32 |
| 2026-10-03 00:00 |
20:41:19.46 |
-40:48:02.7 |
HIP 102063 |
13.99 |
| 2026-10-03 12:00 |
20:41:16.85 |
-40:47:49.7 |
HIP 102063 |
13.66 |
| 2026-10-04 00:00 |
20:41:14.29 |
-40:47:36.5 |
HIP 102063 |
13.35 |
| 2026-10-04 12:00 |
20:41:11.76 |
-40:47:23.1 |
HIP 102063 |
13.05 |
| 2026-10-05 00:00 |
20:41:09.27 |
-40:47:09.6 |
HIP 102063 |
12.76 |
| 2026-10-05 12:00 |
20:41:06.82 |
-40:46:55.8 |
HIP 102063 |
12.48 |
| 2026-10-06 00:00 |
20:41:04.41 |
-40:46:41.8 |
HIP 102063 |
12.22 |
| 2026-10-06 12:00 |
20:41:02.04 |
-40:46:27.7 |
HIP 102063 |
11.97 |
| 2026-10-07 00:00 |
20:40:59.72 |
-40:46:13.4 |
HIP 102063 |
11.73 |
| 2026-10-07 12:00 |
20:40:57.43 |
-40:45:58.8 |
HIP 102063 |
11.51 |
| 2026-10-08 00:00 |
20:40:55.18 |
-40:45:44.2 |
HIP 102063 |
11.30 |
| 2026-10-08 12:00 |
20:40:52.97 |
-40:45:29.3 |
HIP 102063 |
11.10 |
| 2026-10-09 00:00 |
20:40:50.81 |
-40:45:14.2 |
HIP 102063 |
10.92 |
| 2026-10-09 12:00 |
20:40:48.68 |
-40:44:59.0 |
HIP 102063 |
10.75 |
| 2026-10-10 00:00 |
20:40:46.60 |
-40:44:43.6 |
HIP 102063 |
10.60 |
| 2026-10-10 12:00 |
20:40:44.55 |
-40:44:28.0 |
HIP 102063 |
10.46 |
| 2026-10-11 00:00 |
20:40:42.55 |
-40:44:12.2 |
HIP 102063 |
10.33 |
| 2026-10-11 12:00 |
20:40:40.59 |
-40:43:56.3 |
HIP 102063 |
10.22 |
| 2026-10-12 00:00 |
20:40:38.67 |
-40:43:40.2 |
HIP 102063 |
10.12 |
| 2026-10-12 12:00 |
20:40:36.79 |
-40:43:23.9 |
HIP 102063 |
10.03 |
| 2026-10-13 00:00 |
20:40:34.96 |
-40:43:07.5 |
HIP 102063 |
9.96 |
| 2026-10-13 12:00 |
20:40:33.16 |
-40:42:50.9 |
HIP 102063 |
9.90 |
| 2026-10-14 00:00 |
20:40:31.41 |
-40:42:34.1 |
HIP 102063 |
9.85 |
| 2026-10-14 12:00 |
20:40:29.70 |
-40:42:17.2 |
HIP 102063 |
9.82 |
| 2026-10-15 00:00 |
20:40:28.03 |
-40:42:00.1 |
HIP 102063 |
9.79 |
| 2026-10-15 12:00 |
20:40:26.41 |
-40:41:42.8 |
HIP 102063 |
9.78 |
| 2026-10-16 00:00 |
20:40:24.82 |
-40:41:25.4 |
HIP 102063 |
9.78 |