| 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) |
| 2026-03-26 00:00 |
09:14:26.27 |
-27:30:56.1 |
HIP 45301 |
5.92 |
| 2026-03-26 12:00 |
09:14:23.34 |
-27:30:15.2 |
HIP 45301 |
5.35 |
| 2026-03-27 00:00 |
09:14:20.45 |
-27:29:34.1 |
HIP 45301 |
4.90 |
| 2026-03-27 12:00 |
09:14:17.59 |
-27:28:52.9 |
HIP 45301 |
4.61 |
| 2026-03-28 00:00 |
09:14:14.76 |
-27:28:11.5 |
HIP 45301 |
4.51 |
| 2026-03-28 12:00 |
09:14:11.97 |
-27:27:30.1 |
HIP 45301 |
4.60 |
| 2026-03-29 00:00 |
09:14:09.21 |
-27:26:48.4 |
HIP 45301 |
4.87 |
| 2026-03-29 12:00 |
09:14:06.49 |
-27:26:06.7 |
HIP 45301 |
5.30 |
| 2026-03-30 00:00 |
09:14:03.80 |
-27:25:24.8 |
HIP 45301 |
5.85 |
| 2026-03-30 12:00 |
09:14:01.14 |
-27:24:42.8 |
HIP 45301 |
6.48 |
| 2026-03-31 00:00 |
09:13:58.52 |
-27:24:00.7 |
HIP 45301 |
7.18 |
| 2026-03-31 12:00 |
09:13:55.94 |
-27:23:18.4 |
HIP 45301 |
7.92 |
| 2026-04-01 00:00 |
09:13:53.39 |
-27:22:36.1 |
HIP 45301 |
8.69 |
| 2026-04-01 12:00 |
09:13:50.87 |
-27:21:53.6 |
HIP 45301 |
9.49 |
| 2026-04-02 00:00 |
09:13:48.39 |
-27:21:11.0 |
HIP 45301 |
10.31 |
| 2026-04-02 12:00 |
09:13:45.94 |
-27:20:28.3 |
HIP 45301 |
11.13 |
| 2026-04-03 00:00 |
09:13:43.53 |
-27:19:45.5 |
HIP 45301 |
11.97 |
| 2026-04-03 12:00 |
09:13:41.16 |
-27:19:02.6 |
HIP 45301 |
12.81 |
| 2026-04-04 00:00 |
09:13:38.82 |
-27:18:19.7 |
HIP 45301 |
13.66 |
| 2026-04-04 12:00 |
09:13:36.51 |
-27:17:36.6 |
HIP 45301 |
14.51 |
| 2026-04-05 00:00 |
09:13:34.25 |
-27:16:53.4 |
HIP 45301 |
15.36 |
| 2026-04-05 12:00 |
09:13:32.02 |
-27:16:10.2 |
HIP 45301 |
16.21 |
| 2026-04-06 00:00 |
09:13:29.82 |
-27:15:26.9 |
HIP 45231 |
16.12 |
| 2026-04-06 12:00 |
09:13:27.66 |
-27:14:43.5 |
HIP 45231 |
15.28 |
| 2026-04-07 00:00 |
09:13:25.54 |
-27:14:00.1 |
HIP 45231 |
14.45 |
| 2026-04-07 12:00 |
09:13:23.46 |
-27:13:16.5 |
HIP 45231 |
13.62 |
| 2026-04-08 00:00 |
09:13:21.41 |
-27:12:32.9 |
HIP 45231 |
12.79 |
| 2026-04-08 12:00 |
09:13:19.40 |
-27:11:49.3 |
HIP 45231 |
11.97 |
| 2026-04-09 00:00 |
09:13:17.43 |
-27:11:05.6 |
HIP 45231 |
11.16 |
| 2026-04-09 12:00 |
09:13:15.49 |
-27:10:21.8 |
HIP 45231 |
10.35 |
| 2026-04-10 00:00 |
09:13:13.60 |
-27:09:38.0 |
HIP 45231 |
9.55 |
| 2026-04-10 12:00 |
09:13:11.74 |
-27:08:54.2 |
HIP 45231 |
8.76 |
| 2026-04-11 00:00 |
09:13:09.91 |
-27:08:10.3 |
HIP 45231 |
7.98 |
| 2026-04-11 12:00 |
09:13:08.13 |
-27:07:26.3 |
HIP 45231 |
7.21 |
| 2026-04-12 00:00 |
09:13:06.38 |
-27:06:42.4 |
HIP 45231 |
6.46 |
| 2026-04-12 12:00 |
09:13:04.67 |
-27:05:58.4 |
HIP 45231 |
5.73 |
| 2026-04-13 00:00 |
09:13:03.00 |
-27:05:14.3 |
HIP 45231 |
5.03 |
| 2026-04-13 12:00 |
09:13:01.37 |
-27:04:30.3 |
HIP 45231 |
4.36 |
| 2026-04-14 00:00 |
09:12:59.78 |
-27:03:46.2 |
HIP 45231 |
3.76 |
| 2026-04-14 12:00 |
09:12:58.22 |
-27:03:02.1 |
HIP 45231 |
3.24 |
| 2026-04-15 00:00 |
09:12:56.71 |
-27:02:18.0 |
HIP 45231 |
2.86 |
| 2026-04-15 12:00 |
09:12:55.23 |
-27:01:33.9 |
HIP 45231 |
2.67 |
| 2026-04-16 00:00 |
09:12:53.80 |
-27:00:49.8 |
HIP 45231 |
2.71 |