| Parameter |
Value |
| Designation |
C/1999 T3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-08-30T08:59:22.329600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:02Z |
| Obs used |
227 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-02-09.0000000 |
| e |
1.00305659 |
| q (au) |
5.368403 |
| a (au) |
-1756.337617 |
| i (deg) |
104.759114 |
| Ω (om, deg) |
223.515431 |
| ω (w, deg) |
211.096887 |
| M (ma, deg) |
-0.002723 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.494 + 4.236\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.494 |
| n |
4.236 |
| gf |
0.998 |
| gb |
-0.963 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
14:36:59.60 |
-24:35:08.7 |
HIP 71450 |
7.65 |
| 2026-07-29 12:00 |
14:36:59.36 |
-24:34:58.3 |
HIP 71450 |
7.47 |
| 2026-07-30 00:00 |
14:36:59.14 |
-24:34:47.9 |
HIP 71450 |
7.30 |
| 2026-07-30 12:00 |
14:36:58.95 |
-24:34:37.7 |
HIP 71450 |
7.13 |
| 2026-07-31 00:00 |
14:36:58.78 |
-24:34:27.6 |
HIP 71450 |
6.97 |
| 2026-07-31 12:00 |
14:36:58.63 |
-24:34:17.5 |
HIP 71450 |
6.81 |
| 2026-08-01 00:00 |
14:36:58.50 |
-24:34:07.6 |
HIP 71450 |
6.65 |
| 2026-08-01 12:00 |
14:36:58.40 |
-24:33:57.8 |
HIP 71450 |
6.50 |
| 2026-08-02 00:00 |
14:36:58.33 |
-24:33:48.1 |
HIP 71450 |
6.36 |
| 2026-08-02 12:00 |
14:36:58.27 |
-24:33:38.5 |
HIP 71450 |
6.22 |
| 2026-08-03 00:00 |
14:36:58.24 |
-24:33:29.0 |
HIP 71450 |
6.09 |
| 2026-08-03 12:00 |
14:36:58.23 |
-24:33:19.6 |
HIP 71450 |
5.96 |
| 2026-08-04 00:00 |
14:36:58.25 |
-24:33:10.3 |
HIP 71450 |
5.83 |
| 2026-08-04 12:00 |
14:36:58.29 |
-24:33:01.1 |
HIP 71450 |
5.72 |
| 2026-08-05 00:00 |
14:36:58.35 |
-24:32:52.0 |
HIP 71450 |
5.61 |
| 2026-08-05 12:00 |
14:36:58.44 |
-24:32:43.0 |
HIP 71450 |
5.51 |
| 2026-08-06 00:00 |
14:36:58.55 |
-24:32:34.1 |
HIP 71450 |
5.41 |
| 2026-08-06 12:00 |
14:36:58.68 |
-24:32:25.4 |
HIP 71450 |
5.32 |
| 2026-08-07 00:00 |
14:36:58.84 |
-24:32:16.7 |
HIP 71450 |
5.24 |
| 2026-08-07 12:00 |
14:36:59.02 |
-24:32:08.1 |
HIP 71450 |
5.17 |
| 2026-08-08 00:00 |
14:36:59.22 |
-24:31:59.7 |
HIP 71450 |
5.11 |
| 2026-08-08 12:00 |
14:36:59.44 |
-24:31:51.4 |
HIP 71450 |
5.05 |
| 2026-08-09 00:00 |
14:36:59.69 |
-24:31:43.1 |
HIP 71450 |
5.01 |
| 2026-08-09 12:00 |
14:36:59.97 |
-24:31:35.0 |
HIP 71450 |
4.97 |
| 2026-08-10 00:00 |
14:37:00.26 |
-24:31:27.0 |
HIP 71450 |
4.94 |
| 2026-08-10 12:00 |
14:37:00.58 |
-24:31:19.1 |
HIP 71450 |
4.92 |
| 2026-08-11 00:00 |
14:37:00.92 |
-24:31:11.4 |
HIP 71450 |
4.92 |
| 2026-08-11 12:00 |
14:37:01.29 |
-24:31:03.7 |
HIP 71450 |
4.92 |
| 2026-08-12 00:00 |
14:37:01.68 |
-24:30:56.1 |
HIP 71450 |
4.93 |
| 2026-08-12 12:00 |
14:37:02.09 |
-24:30:48.7 |
HIP 71450 |
4.96 |
| 2026-08-13 00:00 |
14:37:02.52 |
-24:30:41.3 |
HIP 71450 |
4.99 |
| 2026-08-13 12:00 |
14:37:02.98 |
-24:30:34.1 |
HIP 71450 |
5.03 |
| 2026-08-14 00:00 |
14:37:03.46 |
-24:30:27.0 |
HIP 71450 |
5.09 |
| 2026-08-14 12:00 |
14:37:03.97 |
-24:30:20.0 |
HIP 71450 |
5.15 |
| 2026-08-15 00:00 |
14:37:04.49 |
-24:30:13.1 |
HIP 71450 |
5.22 |
| 2026-08-15 12:00 |
14:37:05.04 |
-24:30:06.4 |
HIP 71450 |
5.31 |
| 2026-08-16 00:00 |
14:37:05.61 |
-24:29:59.7 |
HIP 71450 |
5.40 |
| 2026-08-16 12:00 |
14:37:06.21 |
-24:29:53.1 |
HIP 71450 |
5.50 |
| 2026-08-17 00:00 |
14:37:06.83 |
-24:29:46.7 |
HIP 71450 |
5.61 |
| 2026-08-17 12:00 |
14:37:07.47 |
-24:29:40.4 |
HIP 71450 |
5.73 |
| 2026-08-18 00:00 |
14:37:08.13 |
-24:29:34.2 |
HIP 71450 |
5.86 |
| 2026-08-18 12:00 |
14:37:08.82 |
-24:29:28.1 |
HIP 71450 |
6.00 |
| 2026-08-19 00:00 |
14:37:09.52 |
-24:29:22.1 |
HIP 71450 |
6.14 |