| 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) |
| 2026-07-29 00:00 |
03:14:03.84 |
+08:35:05.3 |
HIP 15099 |
26.10 |
| 2026-07-29 12:00 |
03:14:04.57 |
+08:34:57.6 |
HIP 15099 |
26.14 |
| 2026-07-30 00:00 |
03:14:05.28 |
+08:34:49.7 |
HIP 15099 |
26.19 |
| 2026-07-30 12:00 |
03:14:05.94 |
+08:34:41.7 |
HIP 15099 |
26.25 |
| 2026-07-31 00:00 |
03:14:06.57 |
+08:34:33.5 |
HIP 15099 |
26.32 |
| 2026-07-31 12:00 |
03:14:07.16 |
+08:34:25.1 |
HIP 15099 |
26.39 |
| 2026-08-01 00:00 |
03:14:07.72 |
+08:34:16.5 |
HIP 15099 |
26.47 |
| 2026-08-01 12:00 |
03:14:08.24 |
+08:34:07.8 |
HIP 15099 |
26.56 |
| 2026-08-02 00:00 |
03:14:08.72 |
+08:33:58.9 |
HIP 15099 |
26.66 |
| 2026-08-02 12:00 |
03:14:09.17 |
+08:33:49.8 |
HIP 15099 |
26.76 |
| 2026-08-03 00:00 |
03:14:09.58 |
+08:33:40.5 |
HIP 15099 |
26.87 |
| 2026-08-03 12:00 |
03:14:09.96 |
+08:33:31.1 |
HIP 15099 |
26.99 |
| 2026-08-04 00:00 |
03:14:10.29 |
+08:33:21.5 |
HIP 15099 |
27.11 |
| 2026-08-04 12:00 |
03:14:10.60 |
+08:33:11.7 |
HIP 15099 |
27.24 |
| 2026-08-05 00:00 |
03:14:10.86 |
+08:33:01.8 |
HIP 15099 |
27.37 |
| 2026-08-05 12:00 |
03:14:11.08 |
+08:32:51.6 |
HIP 15099 |
27.52 |
| 2026-08-06 00:00 |
03:14:11.27 |
+08:32:41.3 |
HIP 15099 |
27.66 |
| 2026-08-06 12:00 |
03:14:11.43 |
+08:32:30.9 |
HIP 15099 |
27.82 |
| 2026-08-07 00:00 |
03:14:11.54 |
+08:32:20.3 |
HIP 15099 |
27.98 |
| 2026-08-07 12:00 |
03:14:11.62 |
+08:32:09.5 |
HIP 15099 |
28.14 |
| 2026-08-08 00:00 |
03:14:11.65 |
+08:31:58.5 |
HIP 15099 |
28.31 |
| 2026-08-08 12:00 |
03:14:11.65 |
+08:31:47.4 |
HIP 15099 |
28.49 |
| 2026-08-09 00:00 |
03:14:11.62 |
+08:31:36.0 |
HIP 15099 |
28.67 |
| 2026-08-09 12:00 |
03:14:11.54 |
+08:31:24.6 |
HIP 15099 |
28.86 |
| 2026-08-10 00:00 |
03:14:11.43 |
+08:31:12.9 |
HIP 15099 |
29.05 |
| 2026-08-10 12:00 |
03:14:11.28 |
+08:31:01.1 |
HIP 15099 |
29.25 |
| 2026-08-11 00:00 |
03:14:11.09 |
+08:30:49.1 |
HIP 15099 |
29.46 |
| 2026-08-11 12:00 |
03:14:10.86 |
+08:30:37.0 |
HIP 15099 |
29.67 |
| 2026-08-12 00:00 |
03:14:10.59 |
+08:30:24.7 |
HIP 15099 |
29.88 |
| 2026-08-12 12:00 |
03:14:10.29 |
+08:30:12.2 |
HIP 15099 |
30.10 |
| 2026-08-13 00:00 |
03:14:09.94 |
+08:29:59.6 |
HIP 15099 |
30.33 |
| 2026-08-13 12:00 |
03:14:09.56 |
+08:29:46.8 |
HIP 15099 |
30.56 |
| 2026-08-14 00:00 |
03:14:09.14 |
+08:29:33.8 |
HIP 15099 |
30.80 |
| 2026-08-14 12:00 |
03:14:08.68 |
+08:29:20.7 |
HIP 15099 |
31.04 |
| 2026-08-15 00:00 |
03:14:08.18 |
+08:29:07.4 |
HIP 15099 |
31.29 |
| 2026-08-15 12:00 |
03:14:07.64 |
+08:28:53.9 |
HIP 15099 |
31.54 |
| 2026-08-16 00:00 |
03:14:07.07 |
+08:28:40.3 |
HIP 15099 |
31.80 |
| 2026-08-16 12:00 |
03:14:06.45 |
+08:28:26.6 |
HIP 15099 |
32.07 |
| 2026-08-17 00:00 |
03:14:05.80 |
+08:28:12.6 |
HIP 15099 |
32.34 |
| 2026-08-17 12:00 |
03:14:05.10 |
+08:27:58.5 |
HIP 15099 |
32.62 |
| 2026-08-18 00:00 |
03:14:04.37 |
+08:27:44.3 |
HIP 15099 |
32.90 |
| 2026-08-18 12:00 |
03:14:03.60 |
+08:27:29.9 |
HIP 15099 |
33.19 |
| 2026-08-19 00:00 |
03:14:02.79 |
+08:27:15.4 |
HIP 15099 |
33.48 |