193P/LINEAR-NEAT
| Parameter |
Value |
| Designation |
193P/LINEAR-NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-11-24T15:42:23.192640Z |
| Orbit solution date (soln_date, UTC) |
2024-08-25T21:12:14Z |
| Obs used |
944 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
27.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-07-11.0000000 |
| e |
0.39417816 |
| q (au) |
2.166103 |
| a (au) |
3.575479 |
| i (deg) |
10.686952 |
| Ω (om, deg) |
335.193501 |
| ω (w, deg) |
8.435134 |
| M (ma, deg) |
33.288578 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.321 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.321 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.603 |
| k |
0.800 |
| δ90 |
9.996 |
| 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) |
| 2026-02-03 00:00 |
13:12:09.74 |
-15:10:04.3 |
HIP 64504 |
23.67 |
| 2026-02-03 12:00 |
13:12:08.46 |
-15:11:11.7 |
HIP 64504 |
23.06 |
| 2026-02-04 00:00 |
13:12:06.97 |
-15:12:17.9 |
HIP 64504 |
22.55 |
| 2026-02-04 12:00 |
13:12:05.26 |
-15:13:22.9 |
HIP 64504 |
22.14 |
| 2026-02-05 00:00 |
13:12:03.32 |
-15:14:26.7 |
HIP 64504 |
21.84 |
| 2026-02-05 12:00 |
13:12:01.16 |
-15:15:29.3 |
HIP 64504 |
21.65 |
| 2026-02-06 00:00 |
13:11:58.78 |
-15:16:30.7 |
HIP 64504 |
21.59 |
| 2026-02-06 12:00 |
13:11:56.18 |
-15:17:30.8 |
HIP 64504 |
21.64 |
| 2026-02-07 00:00 |
13:11:53.35 |
-15:18:29.6 |
HIP 64504 |
21.82 |
| 2026-02-07 12:00 |
13:11:50.29 |
-15:19:27.2 |
HIP 64268 |
21.71 |
| 2026-02-08 00:00 |
13:11:47.02 |
-15:20:23.5 |
HIP 64268 |
20.85 |
| 2026-02-08 12:00 |
13:11:43.51 |
-15:21:18.6 |
HIP 64268 |
19.97 |
| 2026-02-09 00:00 |
13:11:39.78 |
-15:22:12.4 |
HIP 64268 |
19.09 |
| 2026-02-09 12:00 |
13:11:35.83 |
-15:23:04.9 |
HIP 64268 |
18.19 |
| 2026-02-10 00:00 |
13:11:31.65 |
-15:23:56.1 |
HIP 64268 |
17.29 |
| 2026-02-10 12:00 |
13:11:27.24 |
-15:24:46.0 |
HIP 64268 |
16.38 |
| 2026-02-11 00:00 |
13:11:22.61 |
-15:25:34.6 |
HIP 64268 |
15.48 |
| 2026-02-11 12:00 |
13:11:17.75 |
-15:26:21.9 |
HIP 64268 |
14.60 |
| 2026-02-12 00:00 |
13:11:12.66 |
-15:27:07.8 |
HIP 64268 |
13.75 |
| 2026-02-12 12:00 |
13:11:07.35 |
-15:27:52.4 |
HIP 64268 |
12.94 |
| 2026-02-13 00:00 |
13:11:01.81 |
-15:28:35.7 |
HIP 64268 |
12.20 |
| 2026-02-13 12:00 |
13:10:56.04 |
-15:29:17.7 |
HIP 64268 |
11.56 |
| 2026-02-14 00:00 |
13:10:50.05 |
-15:29:58.2 |
HIP 64268 |
11.05 |
| 2026-02-14 12:00 |
13:10:43.83 |
-15:30:37.5 |
HIP 64268 |
10.71 |
| 2026-02-15 00:00 |
13:10:37.39 |
-15:31:15.3 |
HIP 64268 |
10.57 |
| 2026-02-15 12:00 |
13:10:30.72 |
-15:31:51.8 |
HIP 64268 |
10.66 |
| 2026-02-16 00:00 |
13:10:23.82 |
-15:32:27.0 |
HIP 64268 |
10.99 |
| 2026-02-16 12:00 |
13:10:16.70 |
-15:33:00.7 |
HIP 64268 |
11.57 |
| 2026-02-17 00:00 |
13:10:09.36 |
-15:33:33.0 |
HIP 64268 |
12.37 |
| 2026-02-17 12:00 |
13:10:01.79 |
-15:34:04.0 |
HIP 64268 |
13.38 |
| 2026-02-18 00:00 |
13:09:54.00 |
-15:34:33.6 |
HIP 64268 |
14.57 |
| 2026-02-18 12:00 |
13:09:45.98 |
-15:35:01.7 |
HIP 64268 |
15.91 |
| 2026-02-19 00:00 |
13:09:37.74 |
-15:35:28.5 |
HIP 64268 |
17.40 |
| 2026-02-19 12:00 |
13:09:29.28 |
-15:35:53.8 |
HIP 64268 |
19.00 |
| 2026-02-20 00:00 |
13:09:20.60 |
-15:36:17.7 |
HIP 64268 |
20.71 |
| 2026-02-20 12:00 |
13:09:11.70 |
-15:36:40.2 |
HIP 64268 |
22.51 |
| 2026-02-21 00:00 |
13:09:02.58 |
-15:37:01.3 |
HIP 64268 |
24.40 |
| 2026-02-21 12:00 |
13:08:53.24 |
-15:37:20.9 |
HIP 64268 |
26.37 |
| 2026-02-22 00:00 |
13:08:43.69 |
-15:37:39.2 |
HIP 64268 |
28.41 |
| 2026-02-22 12:00 |
13:08:33.91 |
-15:37:55.9 |
HIP 64268 |
30.53 |
| 2026-02-23 00:00 |
13:08:23.92 |
-15:38:11.3 |
HIP 64268 |
32.71 |
| 2026-02-23 12:00 |
13:08:13.72 |
-15:38:25.2 |
HIP 64268 |
34.96 |
| 2026-02-24 00:00 |
13:08:03.30 |
-15:38:37.7 |
HIP 64268 |
37.27 |