354P/LINEAR
| Parameter |
Value |
| Designation |
354P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-05-21T23:06:18.938880Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T15:09:05Z |
| Obs used |
250 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-02-13.0000000 |
| e |
0.12497150 |
| q (au) |
2.003549 |
| a (au) |
2.289696 |
| i (deg) |
5.256074 |
| Ω (om, deg) |
320.235372 |
| ω (w, deg) |
132.732437 |
| M (ma, deg) |
75.964266 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.328 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.328 |
| n |
2.000 |
| gf |
0.945 |
| gb |
-0.761 |
| k |
0.999 |
| δ90 |
8.409 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
21:26:03.23 |
-15:01:00.0 |
HIP 105861 |
14.87 |
| 2026-02-03 12:00 |
21:26:57.24 |
-14:56:12.9 |
HIP 105997 |
17.24 |
| 2026-02-04 00:00 |
21:27:51.23 |
-14:51:24.9 |
HIP 105997 |
3.35 |
| 2026-02-04 12:00 |
21:28:45.20 |
-14:46:36.0 |
HIP 106050 |
3.19 |
| 2026-02-05 00:00 |
21:29:39.16 |
-14:41:46.2 |
HIP 106050 |
14.20 |
| 2026-02-05 12:00 |
21:30:33.09 |
-14:36:55.6 |
HIP 106199 |
19.54 |
| 2026-02-06 00:00 |
21:31:27.00 |
-14:32:04.0 |
HIP 106374 |
18.18 |
| 2026-02-06 12:00 |
21:32:20.90 |
-14:27:11.6 |
HIP 106374 |
4.77 |
| 2026-02-07 00:00 |
21:33:14.77 |
-14:22:18.3 |
HIP 106374 |
10.14 |
| 2026-02-07 12:00 |
21:34:08.63 |
-14:17:24.1 |
HIP 106525 |
21.19 |
| 2026-02-08 00:00 |
21:35:02.46 |
-14:12:29.1 |
HIP 106584 |
23.58 |
| 2026-02-08 12:00 |
21:35:56.27 |
-14:07:33.2 |
HIP 106653 |
15.83 |
| 2026-02-09 00:00 |
21:36:50.07 |
-14:02:36.5 |
HIP 106653 |
14.24 |
| 2026-02-09 12:00 |
21:37:43.84 |
-13:57:38.9 |
HIP 106922 |
22.52 |
| 2026-02-10 00:00 |
21:38:37.59 |
-13:52:40.4 |
HIP 106922 |
9.18 |
| 2026-02-10 12:00 |
21:39:31.32 |
-13:47:41.1 |
HIP 106922 |
7.16 |
| 2026-02-11 00:00 |
21:40:25.03 |
-13:42:41.0 |
HIP 107082 |
18.97 |
| 2026-02-11 12:00 |
21:41:18.71 |
-13:37:40.1 |
HIP 107082 |
18.46 |
| 2026-02-12 00:00 |
21:42:12.38 |
-13:32:38.3 |
HIP 107220 |
13.69 |
| 2026-02-12 12:00 |
21:43:06.02 |
-13:27:35.7 |
HIP 107220 |
12.89 |
| 2026-02-13 00:00 |
21:43:59.64 |
-13:22:32.3 |
HIP 107220 |
23.15 |
| 2026-02-13 12:00 |
21:44:53.23 |
-13:17:28.0 |
HIP 107422 |
22.75 |
| 2026-02-14 00:00 |
21:45:46.81 |
-13:12:23.0 |
HIP 107588 |
24.87 |
| 2026-02-14 12:00 |
21:46:40.36 |
-13:07:17.2 |
HIP 107588 |
11.31 |
| 2026-02-15 00:00 |
21:47:33.88 |
-13:02:10.6 |
HIP 107588 |
5.40 |
| 2026-02-15 12:00 |
21:48:27.39 |
-12:57:03.2 |
HIP 107588 |
17.96 |
| 2026-02-16 00:00 |
21:49:20.87 |
-12:51:55.0 |
HIP 107750 |
9.85 |
| 2026-02-16 12:00 |
21:50:14.32 |
-12:46:46.0 |
HIP 107750 |
8.80 |
| 2026-02-17 00:00 |
21:51:07.75 |
-12:41:36.3 |
HIP 107750 |
21.22 |
| 2026-02-17 12:00 |
21:52:01.15 |
-12:36:25.8 |
HIP 108005 |
25.80 |
| 2026-02-18 00:00 |
21:52:54.53 |
-12:31:14.5 |
HIP 108074 |
26.60 |
| 2026-02-18 12:00 |
21:53:47.88 |
-12:26:02.5 |
HIP 108074 |
28.23 |
| 2026-02-19 00:00 |
21:54:41.21 |
-12:20:49.8 |
HIP 108180 |
23.17 |
| 2026-02-19 12:00 |
21:55:34.51 |
-12:15:36.3 |
HIP 108180 |
19.14 |
| 2026-02-20 00:00 |
21:56:27.78 |
-12:10:22.1 |
HIP 108180 |
24.28 |
| 2026-02-20 12:00 |
21:57:21.03 |
-12:05:07.1 |
HIP 108458 |
13.88 |
| 2026-02-21 00:00 |
21:58:14.25 |
-11:59:51.5 |
HIP 108458 |
6.33 |
| 2026-02-21 12:00 |
21:59:07.44 |
-11:54:35.1 |
HIP 108458 |
16.78 |
| 2026-02-22 00:00 |
22:00:00.61 |
-11:49:18.1 |
HIP 108619 |
24.37 |
| 2026-02-22 12:00 |
22:00:53.74 |
-11:44:00.3 |
HIP 108703 |
23.82 |
| 2026-02-23 00:00 |
22:01:46.85 |
-11:38:41.8 |
HIP 108703 |
19.99 |
| 2026-02-23 12:00 |
22:02:39.93 |
-11:33:22.7 |
HIP 108703 |
25.03 |
| 2026-02-24 00:00 |
22:03:32.98 |
-11:28:02.8 |
HIP 108703 |
35.33 |