355P/LINEAR-NEAT
| Parameter |
Value |
| Designation |
355P/LINEAR-NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-04-24T14:28:48.817920Z |
| Orbit solution date (soln_date, UTC) |
2023-02-13T23:14:08Z |
| Obs used |
962 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
17.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-04-16.0000000 |
| e |
0.50812349 |
| q (au) |
1.707731 |
| a (au) |
3.471870 |
| i (deg) |
11.044216 |
| Ω (om, deg) |
51.441541 |
| ω (w, deg) |
336.401134 |
| M (ma, deg) |
358.689231 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.405 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.405 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.635 |
| k |
0.800 |
| δ90 |
10.000 |
| 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 |
12:38:50.24 |
+07:30:34.1 |
HIP 61754 |
8.94 |
| 2026-02-03 12:00 |
12:38:42.84 |
+07:32:10.1 |
HIP 61754 |
10.14 |
| 2026-02-04 00:00 |
12:38:35.22 |
+07:33:47.1 |
HIP 61754 |
11.79 |
| 2026-02-04 12:00 |
12:38:27.36 |
+07:35:25.1 |
HIP 61754 |
13.75 |
| 2026-02-05 00:00 |
12:38:19.29 |
+07:37:04.2 |
HIP 61754 |
15.94 |
| 2026-02-05 12:00 |
12:38:10.99 |
+07:38:44.3 |
HIP 61754 |
18.29 |
| 2026-02-06 00:00 |
12:38:02.46 |
+07:40:25.4 |
HIP 61754 |
20.77 |
| 2026-02-06 12:00 |
12:37:53.71 |
+07:42:07.6 |
HIP 61561 |
21.21 |
| 2026-02-07 00:00 |
12:37:44.73 |
+07:43:50.7 |
HIP 61561 |
18.41 |
| 2026-02-07 12:00 |
12:37:35.53 |
+07:45:34.8 |
HIP 61561 |
15.55 |
| 2026-02-08 00:00 |
12:37:26.11 |
+07:47:19.9 |
HIP 61561 |
12.65 |
| 2026-02-08 12:00 |
12:37:16.47 |
+07:49:05.8 |
HIP 61561 |
9.71 |
| 2026-02-09 00:00 |
12:37:06.61 |
+07:50:52.8 |
HIP 61561 |
6.74 |
| 2026-02-09 12:00 |
12:36:56.53 |
+07:52:40.6 |
HIP 61561 |
3.82 |
| 2026-02-10 00:00 |
12:36:46.23 |
+07:54:29.3 |
HIP 61561 |
1.64 |
| 2026-02-10 12:00 |
12:36:35.71 |
+07:56:18.9 |
HIP 61561 |
3.28 |
| 2026-02-11 00:00 |
12:36:24.98 |
+07:58:09.4 |
HIP 61561 |
6.30 |
| 2026-02-11 12:00 |
12:36:14.03 |
+08:00:00.7 |
HIP 61561 |
9.52 |
| 2026-02-12 00:00 |
12:36:02.86 |
+08:01:52.8 |
HIP 61561 |
12.82 |
| 2026-02-12 12:00 |
12:35:51.49 |
+08:03:45.7 |
HIP 61561 |
16.19 |
| 2026-02-13 00:00 |
12:35:39.90 |
+08:05:39.4 |
HIP 61561 |
19.62 |
| 2026-02-13 12:00 |
12:35:28.10 |
+08:07:33.9 |
HIP 61561 |
23.10 |
| 2026-02-14 00:00 |
12:35:16.10 |
+08:09:29.1 |
HIP 61376 |
25.73 |
| 2026-02-14 12:00 |
12:35:03.88 |
+08:11:25.1 |
HIP 61376 |
22.98 |
| 2026-02-15 00:00 |
12:34:51.46 |
+08:13:21.7 |
HIP 61376 |
20.48 |
| 2026-02-15 12:00 |
12:34:38.84 |
+08:15:19.0 |
HIP 61376 |
18.34 |
| 2026-02-16 00:00 |
12:34:26.01 |
+08:17:17.0 |
HIP 61376 |
16.76 |
| 2026-02-16 12:00 |
12:34:12.99 |
+08:19:15.7 |
HIP 61376 |
15.92 |
| 2026-02-17 00:00 |
12:33:59.76 |
+08:21:14.9 |
HIP 61331 |
14.18 |
| 2026-02-17 12:00 |
12:33:46.34 |
+08:23:14.8 |
HIP 61331 |
12.68 |
| 2026-02-18 00:00 |
12:33:32.72 |
+08:25:15.2 |
HIP 61331 |
12.28 |
| 2026-02-18 12:00 |
12:33:18.91 |
+08:27:16.2 |
HIP 61331 |
13.13 |
| 2026-02-19 00:00 |
12:33:04.90 |
+08:29:17.7 |
HIP 61331 |
15.05 |
| 2026-02-19 12:00 |
12:32:50.71 |
+08:31:19.7 |
HIP 61331 |
17.73 |
| 2026-02-20 00:00 |
12:32:36.33 |
+08:33:22.2 |
HIP 61331 |
20.91 |
| 2026-02-20 12:00 |
12:32:21.77 |
+08:35:25.2 |
HIP 61094 |
20.96 |
| 2026-02-21 00:00 |
12:32:07.02 |
+08:37:28.6 |
HIP 61094 |
16.85 |
| 2026-02-21 12:00 |
12:31:52.09 |
+08:39:32.4 |
HIP 61094 |
12.76 |
| 2026-02-22 00:00 |
12:31:36.99 |
+08:41:36.6 |
HIP 61094 |
8.77 |
| 2026-02-22 12:00 |
12:31:21.71 |
+08:43:41.1 |
HIP 61094 |
5.21 |
| 2026-02-23 00:00 |
12:31:06.25 |
+08:45:46.0 |
HIP 61094 |
3.83 |
| 2026-02-23 12:00 |
12:30:50.63 |
+08:47:51.2 |
HIP 61094 |
6.37 |
| 2026-02-24 00:00 |
12:30:34.84 |
+08:49:56.7 |
HIP 61094 |
10.29 |