| Parameter |
Value |
| Designation |
C/2008 R3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-11-22T11:49:46.845120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:23Z |
| Obs used |
517 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
8.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-11-02.0000000 |
| e |
0.89635151 |
| q (au) |
1.909016 |
| a (au) |
18.418176 |
| i (deg) |
43.237853 |
| Ω (om, deg) |
270.553144 |
| ω (w, deg) |
84.160425 |
| M (ma, deg) |
359.744473 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.812 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.812 |
| n |
6.000 |
| 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) |
| 2026-06-01 00:00 |
09:13:28.39 |
-26:00:38.8 |
HIP 45355 |
14.93 |
| 2026-06-01 12:00 |
09:13:30.49 |
-26:00:08.7 |
HIP 45355 |
14.40 |
| 2026-06-02 00:00 |
09:13:32.62 |
-25:59:38.9 |
HIP 45355 |
13.87 |
| 2026-06-02 12:00 |
09:13:34.78 |
-25:59:09.3 |
HIP 45355 |
13.35 |
| 2026-06-03 00:00 |
09:13:36.98 |
-25:58:40.0 |
HIP 45355 |
12.84 |
| 2026-06-03 12:00 |
09:13:39.21 |
-25:58:11.0 |
HIP 45355 |
12.33 |
| 2026-06-04 00:00 |
09:13:41.47 |
-25:57:42.3 |
HIP 45355 |
11.84 |
| 2026-06-04 12:00 |
09:13:43.76 |
-25:57:13.9 |
HIP 45355 |
11.37 |
| 2026-06-05 00:00 |
09:13:46.09 |
-25:56:45.7 |
HIP 45355 |
10.91 |
| 2026-06-05 12:00 |
09:13:48.44 |
-25:56:17.9 |
HIP 45355 |
10.47 |
| 2026-06-06 00:00 |
09:13:50.83 |
-25:55:50.3 |
HIP 45355 |
10.05 |
| 2026-06-06 12:00 |
09:13:53.26 |
-25:55:23.0 |
HIP 45355 |
9.65 |
| 2026-06-07 00:00 |
09:13:55.71 |
-25:54:56.0 |
HIP 45355 |
9.29 |
| 2026-06-07 12:00 |
09:13:58.19 |
-25:54:29.3 |
HIP 45355 |
8.95 |
| 2026-06-08 00:00 |
09:14:00.71 |
-25:54:02.9 |
HIP 45355 |
8.66 |
| 2026-06-08 12:00 |
09:14:03.26 |
-25:53:36.7 |
HIP 45355 |
8.41 |
| 2026-06-09 00:00 |
09:14:05.83 |
-25:53:10.9 |
HIP 45355 |
8.20 |
| 2026-06-09 12:00 |
09:14:08.44 |
-25:52:45.4 |
HIP 45355 |
8.05 |
| 2026-06-10 00:00 |
09:14:11.08 |
-25:52:20.2 |
HIP 45355 |
7.95 |
| 2026-06-10 12:00 |
09:14:13.75 |
-25:51:55.2 |
HIP 45355 |
7.91 |
| 2026-06-11 00:00 |
09:14:16.45 |
-25:51:30.6 |
HIP 45355 |
7.93 |
| 2026-06-11 12:00 |
09:14:19.18 |
-25:51:06.3 |
HIP 45355 |
8.00 |
| 2026-06-12 00:00 |
09:14:21.94 |
-25:50:42.3 |
HIP 45355 |
8.14 |
| 2026-06-12 12:00 |
09:14:24.73 |
-25:50:18.6 |
HIP 45355 |
8.33 |
| 2026-06-13 00:00 |
09:14:27.55 |
-25:49:55.3 |
HIP 45355 |
8.58 |
| 2026-06-13 12:00 |
09:14:30.40 |
-25:49:32.2 |
HIP 45355 |
8.88 |
| 2026-06-14 00:00 |
09:14:33.27 |
-25:49:09.4 |
HIP 45355 |
9.22 |
| 2026-06-14 12:00 |
09:14:36.18 |
-25:48:47.0 |
HIP 45355 |
9.60 |
| 2026-06-15 00:00 |
09:14:39.11 |
-25:48:24.9 |
HIP 45355 |
10.02 |
| 2026-06-15 12:00 |
09:14:42.08 |
-25:48:03.1 |
HIP 45355 |
10.48 |
| 2026-06-16 00:00 |
09:14:45.07 |
-25:47:41.6 |
HIP 45355 |
10.96 |
| 2026-06-16 12:00 |
09:14:48.09 |
-25:47:20.5 |
HIP 45355 |
11.47 |
| 2026-06-17 00:00 |
09:14:51.13 |
-25:46:59.7 |
HIP 45355 |
12.01 |
| 2026-06-17 12:00 |
09:14:54.21 |
-25:46:39.2 |
HIP 45355 |
12.57 |
| 2026-06-18 00:00 |
09:14:57.31 |
-25:46:19.0 |
HIP 45355 |
13.14 |
| 2026-06-18 12:00 |
09:15:00.44 |
-25:45:59.2 |
HIP 45355 |
13.73 |
| 2026-06-19 00:00 |
09:15:03.59 |
-25:45:39.7 |
HIP 45355 |
14.34 |
| 2026-06-19 12:00 |
09:15:06.77 |
-25:45:20.5 |
HIP 45355 |
14.97 |
| 2026-06-20 00:00 |
09:15:09.98 |
-25:45:01.6 |
HIP 45355 |
15.60 |
| 2026-06-20 12:00 |
09:15:13.22 |
-25:44:43.1 |
HIP 45355 |
16.25 |
| 2026-06-21 00:00 |
09:15:16.48 |
-25:44:24.9 |
HIP 45355 |
16.91 |
| 2026-06-21 12:00 |
09:15:19.76 |
-25:44:07.1 |
HIP 45355 |
17.57 |
| 2026-06-22 00:00 |
09:15:23.07 |
-25:43:49.6 |
HIP 45355 |
18.25 |