| Parameter |
Value |
| Designation |
C/2009 T3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-01-12T01:21:23.293440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:35Z |
| Obs used |
401 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
8.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-12-02.0000000 |
| e |
0.99947085 |
| q (au) |
2.281140 |
| a (au) |
4310.962625 |
| i (deg) |
148.741818 |
| Ω (om, deg) |
60.093017 |
| ω (w, deg) |
32.447789 |
| M (ma, deg) |
359.999857 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.720 + 3.596\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.720 |
| n |
3.596 |
| gf |
1.000 |
| gb |
-0.724 |
| k |
0.998 |
| δ90 |
9.993 |
| 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) |
| 2026-09-20 00:00 |
15:34:40.56 |
-20:42:41.1 |
HIP 76302 |
19.18 |
| 2026-09-20 12:00 |
15:34:42.21 |
-20:42:47.3 |
HIP 76302 |
18.94 |
| 2026-09-21 00:00 |
15:34:43.89 |
-20:42:53.6 |
HIP 76302 |
18.71 |
| 2026-09-21 12:00 |
15:34:45.59 |
-20:43:00.0 |
HIP 76302 |
18.48 |
| 2026-09-22 00:00 |
15:34:47.31 |
-20:43:06.4 |
HIP 76302 |
18.25 |
| 2026-09-22 12:00 |
15:34:49.06 |
-20:43:12.9 |
HIP 76302 |
18.02 |
| 2026-09-23 00:00 |
15:34:50.83 |
-20:43:19.6 |
HIP 76302 |
17.80 |
| 2026-09-23 12:00 |
15:34:52.63 |
-20:43:26.3 |
HIP 76302 |
17.58 |
| 2026-09-24 00:00 |
15:34:54.45 |
-20:43:33.1 |
HIP 76302 |
17.37 |
| 2026-09-24 12:00 |
15:34:56.30 |
-20:43:40.0 |
HIP 76302 |
17.17 |
| 2026-09-25 00:00 |
15:34:58.16 |
-20:43:47.0 |
HIP 76302 |
16.97 |
| 2026-09-25 12:00 |
15:35:00.05 |
-20:43:54.0 |
HIP 76302 |
16.78 |
| 2026-09-26 00:00 |
15:35:01.97 |
-20:44:01.1 |
HIP 76302 |
16.60 |
| 2026-09-26 12:00 |
15:35:03.91 |
-20:44:08.4 |
HIP 76302 |
16.42 |
| 2026-09-27 00:00 |
15:35:05.87 |
-20:44:15.7 |
HIP 76302 |
16.26 |
| 2026-09-27 12:00 |
15:35:07.85 |
-20:44:23.0 |
HIP 76302 |
16.11 |
| 2026-09-28 00:00 |
15:35:09.85 |
-20:44:30.5 |
HIP 76302 |
15.96 |
| 2026-09-28 12:00 |
15:35:11.88 |
-20:44:38.1 |
HIP 76302 |
15.84 |
| 2026-09-29 00:00 |
15:35:13.93 |
-20:44:45.7 |
HIP 76302 |
15.72 |
| 2026-09-29 12:00 |
15:35:16.00 |
-20:44:53.4 |
HIP 76302 |
15.62 |
| 2026-09-30 00:00 |
15:35:18.10 |
-20:45:01.2 |
HIP 76302 |
15.53 |
| 2026-09-30 12:00 |
15:35:20.21 |
-20:45:09.0 |
HIP 76302 |
15.46 |
| 2026-10-01 00:00 |
15:35:22.35 |
-20:45:17.0 |
HIP 76302 |
15.40 |
| 2026-10-01 12:00 |
15:35:24.51 |
-20:45:25.0 |
HIP 76302 |
15.36 |
| 2026-10-02 00:00 |
15:35:26.69 |
-20:45:33.1 |
HIP 76302 |
15.34 |
| 2026-10-02 12:00 |
15:35:28.89 |
-20:45:41.3 |
HIP 76302 |
15.34 |
| 2026-10-03 00:00 |
15:35:31.12 |
-20:45:49.5 |
HIP 76302 |
15.36 |
| 2026-10-03 12:00 |
15:35:33.36 |
-20:45:57.9 |
HIP 76302 |
15.39 |
| 2026-10-04 00:00 |
15:35:35.62 |
-20:46:06.3 |
HIP 76302 |
15.45 |
| 2026-10-04 12:00 |
15:35:37.91 |
-20:46:14.8 |
HIP 76302 |
15.52 |
| 2026-10-05 00:00 |
15:35:40.22 |
-20:46:23.3 |
HIP 76302 |
15.61 |
| 2026-10-05 12:00 |
15:35:42.54 |
-20:46:31.9 |
HIP 76302 |
15.73 |
| 2026-10-06 00:00 |
15:35:44.89 |
-20:46:40.6 |
HIP 76302 |
15.86 |
| 2026-10-06 12:00 |
15:35:47.25 |
-20:46:49.4 |
HIP 76302 |
16.02 |
| 2026-10-07 00:00 |
15:35:49.64 |
-20:46:58.3 |
HIP 76302 |
16.20 |
| 2026-10-07 12:00 |
15:35:52.05 |
-20:47:07.2 |
HIP 76302 |
16.39 |
| 2026-10-08 00:00 |
15:35:54.47 |
-20:47:16.2 |
HIP 76302 |
16.61 |
| 2026-10-08 12:00 |
15:35:56.92 |
-20:47:25.2 |
HIP 76302 |
16.84 |
| 2026-10-09 00:00 |
15:35:59.38 |
-20:47:34.4 |
HIP 76302 |
17.10 |
| 2026-10-09 12:00 |
15:36:01.86 |
-20:47:43.6 |
HIP 76302 |
17.37 |
| 2026-10-10 00:00 |
15:36:04.36 |
-20:47:52.8 |
HIP 76302 |
17.66 |
| 2026-10-10 12:00 |
15:36:06.88 |
-20:48:02.2 |
HIP 76302 |
17.97 |
| 2026-10-11 00:00 |
15:36:09.42 |
-20:48:11.6 |
HIP 76302 |
18.30 |