C/2000 G2 (LINEAR)
| Parameter |
Value |
| Designation |
C/2000 G2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-02-06T05:07:48.432000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-04-19.0000000 |
| e |
0.80953903 |
| q (au) |
2.716942 |
| a (au) |
14.265084 |
| i (deg) |
170.479176 |
| Ω (om, deg) |
328.384926 |
| ω (w, deg) |
101.764704 |
| M (ma, deg) |
1.331502 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.341 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.341 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.713 |
| 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 |
02:59:10.50 |
+07:24:48.5 |
HIP 13967 |
12.11 |
| 2026-02-03 12:00 |
02:59:09.81 |
+07:24:57.5 |
HIP 13967 |
12.17 |
| 2026-02-04 00:00 |
02:59:09.16 |
+07:25:06.7 |
HIP 13967 |
12.22 |
| 2026-02-04 12:00 |
02:59:08.55 |
+07:25:16.0 |
HIP 13967 |
12.27 |
| 2026-02-05 00:00 |
02:59:07.97 |
+07:25:25.5 |
HIP 13967 |
12.31 |
| 2026-02-05 12:00 |
02:59:07.44 |
+07:25:35.2 |
HIP 13967 |
12.35 |
| 2026-02-06 00:00 |
02:59:06.95 |
+07:25:45.1 |
HIP 13967 |
12.38 |
| 2026-02-06 12:00 |
02:59:06.49 |
+07:25:55.1 |
HIP 13967 |
12.40 |
| 2026-02-07 00:00 |
02:59:06.08 |
+07:26:05.2 |
HIP 13967 |
12.41 |
| 2026-02-07 12:00 |
02:59:05.71 |
+07:26:15.6 |
HIP 13967 |
12.42 |
| 2026-02-08 00:00 |
02:59:05.38 |
+07:26:26.1 |
HIP 13967 |
12.42 |
| 2026-02-08 12:00 |
02:59:05.08 |
+07:26:36.7 |
HIP 13967 |
12.42 |
| 2026-02-09 00:00 |
02:59:04.83 |
+07:26:47.5 |
HIP 13967 |
12.40 |
| 2026-02-09 12:00 |
02:59:04.62 |
+07:26:58.5 |
HIP 13967 |
12.38 |
| 2026-02-10 00:00 |
02:59:04.44 |
+07:27:09.7 |
HIP 13967 |
12.35 |
| 2026-02-10 12:00 |
02:59:04.31 |
+07:27:21.0 |
HIP 13967 |
12.32 |
| 2026-02-11 00:00 |
02:59:04.22 |
+07:27:32.4 |
HIP 13967 |
12.28 |
| 2026-02-11 12:00 |
02:59:04.16 |
+07:27:44.0 |
HIP 13967 |
12.23 |
| 2026-02-12 00:00 |
02:59:04.15 |
+07:27:55.8 |
HIP 13967 |
12.17 |
| 2026-02-12 12:00 |
02:59:04.17 |
+07:28:07.7 |
HIP 13967 |
12.10 |
| 2026-02-13 00:00 |
02:59:04.24 |
+07:28:19.8 |
HIP 13967 |
12.03 |
| 2026-02-13 12:00 |
02:59:04.34 |
+07:28:32.0 |
HIP 13967 |
11.95 |
| 2026-02-14 00:00 |
02:59:04.48 |
+07:28:44.4 |
HIP 13967 |
11.87 |
| 2026-02-14 12:00 |
02:59:04.67 |
+07:28:56.9 |
HIP 13967 |
11.78 |
| 2026-02-15 00:00 |
02:59:04.89 |
+07:29:09.6 |
HIP 13967 |
11.68 |
| 2026-02-15 12:00 |
02:59:05.15 |
+07:29:22.4 |
HIP 13967 |
11.57 |
| 2026-02-16 00:00 |
02:59:05.45 |
+07:29:35.4 |
HIP 13967 |
11.46 |
| 2026-02-16 12:00 |
02:59:05.79 |
+07:29:48.5 |
HIP 13967 |
11.34 |
| 2026-02-17 00:00 |
02:59:06.16 |
+07:30:01.7 |
HIP 13967 |
11.21 |
| 2026-02-17 12:00 |
02:59:06.58 |
+07:30:15.1 |
HIP 13967 |
11.08 |
| 2026-02-18 00:00 |
02:59:07.03 |
+07:30:28.6 |
HIP 13967 |
10.94 |
| 2026-02-18 12:00 |
02:59:07.53 |
+07:30:42.3 |
HIP 13967 |
10.80 |
| 2026-02-19 00:00 |
02:59:08.06 |
+07:30:56.1 |
HIP 13967 |
10.65 |
| 2026-02-19 12:00 |
02:59:08.63 |
+07:31:10.0 |
HIP 13967 |
10.50 |
| 2026-02-20 00:00 |
02:59:09.24 |
+07:31:24.1 |
HIP 13967 |
10.34 |
| 2026-02-20 12:00 |
02:59:09.88 |
+07:31:38.3 |
HIP 13967 |
10.18 |
| 2026-02-21 00:00 |
02:59:10.56 |
+07:31:52.6 |
HIP 13967 |
10.01 |
| 2026-02-21 12:00 |
02:59:11.29 |
+07:32:07.1 |
HIP 13967 |
9.84 |
| 2026-02-22 00:00 |
02:59:12.04 |
+07:32:21.6 |
HIP 13967 |
9.67 |
| 2026-02-22 12:00 |
02:59:12.84 |
+07:32:36.3 |
HIP 13967 |
9.50 |
| 2026-02-23 00:00 |
02:59:13.67 |
+07:32:51.2 |
HIP 13967 |
9.32 |
| 2026-02-23 12:00 |
02:59:14.54 |
+07:33:06.1 |
HIP 13967 |
9.15 |
| 2026-02-24 00:00 |
02:59:15.45 |
+07:33:21.2 |
HIP 13967 |
8.97 |