| 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) |
| 2026-06-01 00:00 |
14:39:52.82 |
-25:03:36.6 |
HIP 71652 |
7.23 |
| 2026-06-01 12:00 |
14:39:50.31 |
-25:03:19.7 |
HIP 71652 |
6.61 |
| 2026-06-02 00:00 |
14:39:47.82 |
-25:03:02.7 |
HIP 71652 |
6.00 |
| 2026-06-02 12:00 |
14:39:45.34 |
-25:02:45.7 |
HIP 71652 |
5.39 |
| 2026-06-03 00:00 |
14:39:42.87 |
-25:02:28.8 |
HIP 71652 |
4.79 |
| 2026-06-03 12:00 |
14:39:40.42 |
-25:02:11.8 |
HIP 71652 |
4.20 |
| 2026-06-04 00:00 |
14:39:37.97 |
-25:01:54.8 |
HIP 71652 |
3.62 |
| 2026-06-04 12:00 |
14:39:35.54 |
-25:01:37.9 |
HIP 71652 |
3.07 |
| 2026-06-05 00:00 |
14:39:33.13 |
-25:01:20.9 |
HIP 71652 |
2.55 |
| 2026-06-05 12:00 |
14:39:30.72 |
-25:01:04.0 |
HIP 71652 |
2.08 |
| 2026-06-06 00:00 |
14:39:28.33 |
-25:00:47.1 |
HIP 71652 |
1.71 |
| 2026-06-06 12:00 |
14:39:25.96 |
-25:00:30.1 |
HIP 71652 |
1.51 |
| 2026-06-07 00:00 |
14:39:23.60 |
-25:00:13.2 |
HIP 71652 |
1.54 |
| 2026-06-07 12:00 |
14:39:21.25 |
-24:59:56.3 |
HIP 71652 |
1.78 |
| 2026-06-08 00:00 |
14:39:18.91 |
-24:59:39.4 |
HIP 71652 |
2.17 |
| 2026-06-08 12:00 |
14:39:16.59 |
-24:59:22.6 |
HIP 71652 |
2.64 |
| 2026-06-09 00:00 |
14:39:14.29 |
-24:59:05.7 |
HIP 71652 |
3.15 |
| 2026-06-09 12:00 |
14:39:12.00 |
-24:58:48.9 |
HIP 71652 |
3.68 |
| 2026-06-10 00:00 |
14:39:09.72 |
-24:58:32.0 |
HIP 71652 |
4.22 |
| 2026-06-10 12:00 |
14:39:07.46 |
-24:58:15.2 |
HIP 71652 |
4.78 |
| 2026-06-11 00:00 |
14:39:05.22 |
-24:57:58.4 |
HIP 71652 |
5.33 |
| 2026-06-11 12:00 |
14:39:02.99 |
-24:57:41.7 |
HIP 71652 |
5.89 |
| 2026-06-12 00:00 |
14:39:00.77 |
-24:57:24.9 |
HIP 71652 |
6.45 |
| 2026-06-12 12:00 |
14:38:58.57 |
-24:57:08.2 |
HIP 71652 |
7.01 |
| 2026-06-13 00:00 |
14:38:56.39 |
-24:56:51.5 |
HIP 71652 |
7.56 |
| 2026-06-13 12:00 |
14:38:54.23 |
-24:56:34.8 |
HIP 71652 |
8.12 |
| 2026-06-14 00:00 |
14:38:52.07 |
-24:56:18.2 |
HIP 71652 |
8.67 |
| 2026-06-14 12:00 |
14:38:49.94 |
-24:56:01.6 |
HIP 71652 |
9.23 |
| 2026-06-15 00:00 |
14:38:47.82 |
-24:55:45.0 |
HIP 71652 |
9.77 |
| 2026-06-15 12:00 |
14:38:45.72 |
-24:55:28.4 |
HIP 71652 |
10.32 |
| 2026-06-16 00:00 |
14:38:43.64 |
-24:55:11.9 |
HIP 71652 |
10.86 |
| 2026-06-16 12:00 |
14:38:41.57 |
-24:54:55.4 |
HIP 71652 |
11.40 |
| 2026-06-17 00:00 |
14:38:39.52 |
-24:54:38.9 |
HIP 71652 |
11.94 |
| 2026-06-17 12:00 |
14:38:37.49 |
-24:54:22.5 |
HIP 71652 |
12.47 |
| 2026-06-18 00:00 |
14:38:35.48 |
-24:54:06.1 |
HIP 71652 |
13.00 |
| 2026-06-18 12:00 |
14:38:33.48 |
-24:53:49.8 |
HIP 71652 |
13.53 |
| 2026-06-19 00:00 |
14:38:31.50 |
-24:53:33.5 |
HIP 71652 |
14.05 |
| 2026-06-19 12:00 |
14:38:29.54 |
-24:53:17.2 |
HIP 71652 |
14.57 |
| 2026-06-20 00:00 |
14:38:27.60 |
-24:53:00.9 |
HIP 71652 |
15.09 |
| 2026-06-20 12:00 |
14:38:25.67 |
-24:52:44.7 |
HIP 71652 |
15.60 |
| 2026-06-21 00:00 |
14:38:23.77 |
-24:52:28.6 |
HIP 71652 |
16.11 |
| 2026-06-21 12:00 |
14:38:21.88 |
-24:52:12.5 |
HIP 71652 |
16.61 |
| 2026-06-22 00:00 |
14:38:20.01 |
-24:51:56.4 |
HIP 71652 |
17.12 |