| 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) |
| 2026-03-26 00:00 |
12:52:10.42 |
-15:07:03.9 |
HIP 62872 |
16.94 |
| 2026-03-26 12:00 |
12:51:50.56 |
-15:05:50.9 |
HIP 62872 |
20.64 |
| 2026-03-27 00:00 |
12:51:30.63 |
-15:04:36.7 |
HIP 62872 |
24.79 |
| 2026-03-27 12:00 |
12:51:10.64 |
-15:03:21.4 |
HIP 62611 |
20.23 |
| 2026-03-28 00:00 |
12:50:50.59 |
-15:02:05.0 |
HIP 62611 |
15.57 |
| 2026-03-28 12:00 |
12:50:30.49 |
-15:00:47.4 |
HIP 62611 |
11.21 |
| 2026-03-29 00:00 |
12:50:10.33 |
-14:59:28.8 |
HIP 62611 |
7.70 |
| 2026-03-29 12:00 |
12:49:50.12 |
-14:58:09.1 |
HIP 62611 |
6.63 |
| 2026-03-30 00:00 |
12:49:29.87 |
-14:56:48.3 |
HIP 62611 |
8.95 |
| 2026-03-30 12:00 |
12:49:09.57 |
-14:55:26.4 |
HIP 62611 |
12.97 |
| 2026-03-31 00:00 |
12:48:49.24 |
-14:54:03.6 |
HIP 62611 |
17.57 |
| 2026-03-31 12:00 |
12:48:28.87 |
-14:52:39.7 |
HIP 62611 |
22.41 |
| 2026-04-01 00:00 |
12:48:08.46 |
-14:51:14.8 |
HIP 62508 |
27.11 |
| 2026-04-01 12:00 |
12:47:48.03 |
-14:49:48.9 |
HIP 62508 |
27.47 |
| 2026-04-02 00:00 |
12:47:27.58 |
-14:48:22.1 |
HIP 62508 |
28.75 |
| 2026-04-02 12:00 |
12:47:07.10 |
-14:46:54.3 |
HIP 62222 |
29.66 |
| 2026-04-03 00:00 |
12:46:46.61 |
-14:45:25.5 |
HIP 62222 |
25.33 |
| 2026-04-03 12:00 |
12:46:26.10 |
-14:43:55.9 |
HIP 62222 |
21.38 |
| 2026-04-04 00:00 |
12:46:05.58 |
-14:42:25.3 |
HIP 62222 |
18.06 |
| 2026-04-04 12:00 |
12:45:45.06 |
-14:40:53.9 |
HIP 62222 |
15.79 |
| 2026-04-05 00:00 |
12:45:24.53 |
-14:39:21.6 |
HIP 62222 |
15.06 |
| 2026-04-05 12:00 |
12:45:04.00 |
-14:37:48.5 |
HIP 62222 |
16.09 |
| 2026-04-06 00:00 |
12:44:43.47 |
-14:36:14.6 |
HIP 62222 |
18.58 |
| 2026-04-06 12:00 |
12:44:22.95 |
-14:34:39.8 |
HIP 62222 |
22.06 |
| 2026-04-07 00:00 |
12:44:02.44 |
-14:33:04.3 |
HIP 62222 |
26.12 |
| 2026-04-07 12:00 |
12:43:41.95 |
-14:31:28.0 |
HIP 62222 |
30.54 |
| 2026-04-08 00:00 |
12:43:21.47 |
-14:29:50.9 |
HIP 62222 |
35.19 |
| 2026-04-08 12:00 |
12:43:01.02 |
-14:28:13.1 |
HIP 62096 |
37.46 |
| 2026-04-09 00:00 |
12:42:40.59 |
-14:26:34.7 |
HIP 61853 |
36.53 |
| 2026-04-09 12:00 |
12:42:20.19 |
-14:24:55.5 |
HIP 61853 |
31.55 |
| 2026-04-10 00:00 |
12:41:59.83 |
-14:23:15.7 |
HIP 61853 |
26.65 |
| 2026-04-10 12:00 |
12:41:39.50 |
-14:21:35.2 |
HIP 61853 |
21.90 |
| 2026-04-11 00:00 |
12:41:19.21 |
-14:19:54.1 |
HIP 61853 |
17.41 |
| 2026-04-11 12:00 |
12:40:58.96 |
-14:18:12.4 |
HIP 61853 |
13.42 |
| 2026-04-12 00:00 |
12:40:38.76 |
-14:16:30.2 |
HIP 61853 |
10.54 |
| 2026-04-12 12:00 |
12:40:18.61 |
-14:14:47.4 |
HIP 61853 |
9.77 |
| 2026-04-13 00:00 |
12:39:58.51 |
-14:13:04.1 |
HIP 61853 |
11.53 |
| 2026-04-13 12:00 |
12:39:38.48 |
-14:11:20.2 |
HIP 61853 |
14.95 |
| 2026-04-14 00:00 |
12:39:18.50 |
-14:09:35.9 |
HIP 61651 |
15.93 |
| 2026-04-14 12:00 |
12:38:58.59 |
-14:07:51.1 |
HIP 61651 |
10.81 |
| 2026-04-15 00:00 |
12:38:38.75 |
-14:06:05.9 |
HIP 61651 |
5.70 |
| 2026-04-15 12:00 |
12:38:18.98 |
-14:04:20.3 |
HIP 61651 |
0.83 |
| 2026-04-16 00:00 |
12:37:59.29 |
-14:02:34.3 |
HIP 61651 |
4.57 |