| 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) |
| 2026-03-26 00:00 |
15:47:41.14 |
-21:17:27.1 |
HIP 77360 |
4.13 |
| 2026-03-26 12:00 |
15:47:38.73 |
-21:17:22.4 |
HIP 77360 |
3.78 |
| 2026-03-27 00:00 |
15:47:36.30 |
-21:17:17.7 |
HIP 77360 |
3.48 |
| 2026-03-27 12:00 |
15:47:33.84 |
-21:17:12.8 |
HIP 77360 |
3.25 |
| 2026-03-28 00:00 |
15:47:31.36 |
-21:17:07.9 |
HIP 77360 |
3.11 |
| 2026-03-28 12:00 |
15:47:28.85 |
-21:17:02.9 |
HIP 77360 |
3.08 |
| 2026-03-29 00:00 |
15:47:26.32 |
-21:16:57.7 |
HIP 77360 |
3.16 |
| 2026-03-29 12:00 |
15:47:23.76 |
-21:16:52.5 |
HIP 77360 |
3.35 |
| 2026-03-30 00:00 |
15:47:21.17 |
-21:16:47.3 |
HIP 77360 |
3.63 |
| 2026-03-30 12:00 |
15:47:18.56 |
-21:16:41.9 |
HIP 77360 |
3.99 |
| 2026-03-31 00:00 |
15:47:15.92 |
-21:16:36.4 |
HIP 77360 |
4.41 |
| 2026-03-31 12:00 |
15:47:13.26 |
-21:16:30.9 |
HIP 77360 |
4.88 |
| 2026-04-01 00:00 |
15:47:10.58 |
-21:16:25.2 |
HIP 77360 |
5.38 |
| 2026-04-01 12:00 |
15:47:07.87 |
-21:16:19.5 |
HIP 77360 |
5.92 |
| 2026-04-02 00:00 |
15:47:05.13 |
-21:16:13.7 |
HIP 77360 |
6.48 |
| 2026-04-02 12:00 |
15:47:02.38 |
-21:16:07.8 |
HIP 77360 |
7.05 |
| 2026-04-03 00:00 |
15:46:59.59 |
-21:16:01.8 |
HIP 77360 |
7.65 |
| 2026-04-03 12:00 |
15:46:56.79 |
-21:15:55.8 |
HIP 77360 |
8.26 |
| 2026-04-04 00:00 |
15:46:53.96 |
-21:15:49.6 |
HIP 77360 |
8.88 |
| 2026-04-04 12:00 |
15:46:51.10 |
-21:15:43.4 |
HIP 77360 |
9.51 |
| 2026-04-05 00:00 |
15:46:48.23 |
-21:15:37.1 |
HIP 77360 |
10.15 |
| 2026-04-05 12:00 |
15:46:45.33 |
-21:15:30.7 |
HIP 77360 |
10.81 |
| 2026-04-06 00:00 |
15:46:42.41 |
-21:15:24.2 |
HIP 77360 |
11.47 |
| 2026-04-06 12:00 |
15:46:39.46 |
-21:15:17.7 |
HIP 77360 |
12.14 |
| 2026-04-07 00:00 |
15:46:36.50 |
-21:15:11.0 |
HIP 77360 |
12.81 |
| 2026-04-07 12:00 |
15:46:33.51 |
-21:15:04.3 |
HIP 77360 |
13.50 |
| 2026-04-08 00:00 |
15:46:30.50 |
-21:14:57.5 |
HIP 77360 |
14.19 |
| 2026-04-08 12:00 |
15:46:27.46 |
-21:14:50.6 |
HIP 77360 |
14.89 |
| 2026-04-09 00:00 |
15:46:24.41 |
-21:14:43.7 |
HIP 77360 |
15.59 |
| 2026-04-09 12:00 |
15:46:21.33 |
-21:14:36.7 |
HIP 77360 |
16.31 |
| 2026-04-10 00:00 |
15:46:18.24 |
-21:14:29.5 |
HIP 77360 |
17.02 |
| 2026-04-10 12:00 |
15:46:15.12 |
-21:14:22.4 |
HIP 77360 |
17.75 |
| 2026-04-11 00:00 |
15:46:11.98 |
-21:14:15.1 |
HIP 77360 |
18.48 |
| 2026-04-11 12:00 |
15:46:08.82 |
-21:14:07.7 |
HIP 77360 |
19.21 |
| 2026-04-12 00:00 |
15:46:05.64 |
-21:14:00.3 |
HIP 77360 |
19.95 |
| 2026-04-12 12:00 |
15:46:02.45 |
-21:13:52.8 |
HIP 77360 |
20.70 |
| 2026-04-13 00:00 |
15:45:59.23 |
-21:13:45.3 |
HIP 77360 |
21.45 |
| 2026-04-13 12:00 |
15:45:55.99 |
-21:13:37.6 |
HIP 77360 |
22.21 |
| 2026-04-14 00:00 |
15:45:52.73 |
-21:13:29.9 |
HIP 77360 |
22.97 |
| 2026-04-14 12:00 |
15:45:49.45 |
-21:13:22.1 |
HIP 77360 |
23.73 |
| 2026-04-15 00:00 |
15:45:46.16 |
-21:13:14.3 |
HIP 77360 |
24.51 |
| 2026-04-15 12:00 |
15:45:42.85 |
-21:13:06.3 |
HIP 77360 |
25.28 |
| 2026-04-16 00:00 |
15:45:39.51 |
-21:12:58.3 |
HIP 77360 |
26.06 |