| 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
$$
M_a = (16.325 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.325 |
| n |
2.000 |
| gf |
0.948 |
| gb |
-0.761 |
| k |
0.999 |
| δ90 |
8.702 |
| 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) |
| 2026-09-20 00:00 |
02:42:19.44 |
+23:40:11.1 |
HIP 12730 |
30.13 |
| 2026-09-20 12:00 |
02:42:17.43 |
+23:42:12.4 |
HIP 12730 |
28.82 |
| 2026-09-21 00:00 |
02:42:14.91 |
+23:44:11.5 |
HIP 12730 |
27.72 |
| 2026-09-21 12:00 |
02:42:11.87 |
+23:46:08.3 |
HIP 12730 |
26.83 |
| 2026-09-22 00:00 |
02:42:08.32 |
+23:48:02.8 |
HIP 12730 |
26.20 |
| 2026-09-22 12:00 |
02:42:04.25 |
+23:49:55.0 |
HIP 12730 |
25.84 |
| 2026-09-23 00:00 |
02:41:59.66 |
+23:51:44.7 |
HIP 12730 |
25.77 |
| 2026-09-23 12:00 |
02:41:54.56 |
+23:53:32.1 |
HIP 12730 |
26.00 |
| 2026-09-24 00:00 |
02:41:48.93 |
+23:55:17.1 |
HIP 12730 |
26.52 |
| 2026-09-24 12:00 |
02:41:42.78 |
+23:56:59.6 |
HIP 12730 |
27.33 |
| 2026-09-25 00:00 |
02:41:36.11 |
+23:58:39.7 |
HIP 12730 |
28.41 |
| 2026-09-25 12:00 |
02:41:28.92 |
+24:00:17.2 |
HIP 12730 |
29.75 |
| 2026-09-26 00:00 |
02:41:21.21 |
+24:01:52.2 |
HIP 12730 |
31.33 |
| 2026-09-26 12:00 |
02:41:12.98 |
+24:03:24.7 |
HIP 12367 |
31.75 |
| 2026-09-27 00:00 |
02:41:04.22 |
+24:04:54.5 |
HIP 12367 |
29.27 |
| 2026-09-27 12:00 |
02:40:54.94 |
+24:06:21.8 |
HIP 12367 |
26.71 |
| 2026-09-28 00:00 |
02:40:45.14 |
+24:07:46.4 |
HIP 12367 |
24.08 |
| 2026-09-28 12:00 |
02:40:34.81 |
+24:09:08.3 |
HIP 12367 |
21.35 |
| 2026-09-29 00:00 |
02:40:23.96 |
+24:10:27.5 |
HIP 12367 |
18.55 |
| 2026-09-29 12:00 |
02:40:12.59 |
+24:11:43.9 |
HIP 12367 |
15.66 |
| 2026-09-30 00:00 |
02:40:00.70 |
+24:12:57.6 |
HIP 12367 |
12.69 |
| 2026-09-30 12:00 |
02:39:48.28 |
+24:14:08.4 |
HIP 12367 |
9.66 |
| 2026-10-01 00:00 |
02:39:35.35 |
+24:15:16.5 |
HIP 12367 |
6.57 |
| 2026-10-01 12:00 |
02:39:21.89 |
+24:16:21.6 |
HIP 12367 |
3.59 |
| 2026-10-02 00:00 |
02:39:07.92 |
+24:17:23.9 |
HIP 12367 |
2.03 |
| 2026-10-02 12:00 |
02:38:53.43 |
+24:18:23.2 |
HIP 12367 |
4.34 |
| 2026-10-03 00:00 |
02:38:38.43 |
+24:19:19.6 |
HIP 12367 |
7.68 |
| 2026-10-03 12:00 |
02:38:22.92 |
+24:20:13.0 |
HIP 12367 |
11.26 |
| 2026-10-04 00:00 |
02:38:06.89 |
+24:21:03.3 |
HIP 12367 |
14.98 |
| 2026-10-04 12:00 |
02:37:50.36 |
+24:21:50.6 |
HIP 12367 |
18.82 |
| 2026-10-05 00:00 |
02:37:33.32 |
+24:22:34.9 |
HIP 12189 |
17.89 |
| 2026-10-05 12:00 |
02:37:15.79 |
+24:23:16.0 |
HIP 12189 |
15.95 |
| 2026-10-06 00:00 |
02:36:57.75 |
+24:23:54.1 |
HIP 12189 |
14.95 |
| 2026-10-06 12:00 |
02:36:39.23 |
+24:24:28.9 |
HIP 12184 |
15.00 |
| 2026-10-07 00:00 |
02:36:20.21 |
+24:25:00.6 |
HIP 12184 |
16.28 |
| 2026-10-07 12:00 |
02:36:00.71 |
+24:25:29.1 |
HIP 12184 |
18.63 |
| 2026-10-08 00:00 |
02:35:40.72 |
+24:25:54.4 |
HIP 12184 |
21.78 |
| 2026-10-08 12:00 |
02:35:20.27 |
+24:26:16.4 |
HIP 12184 |
25.48 |
| 2026-10-09 00:00 |
02:34:59.34 |
+24:26:35.2 |
HIP 11993 |
27.39 |
| 2026-10-09 12:00 |
02:34:37.96 |
+24:26:50.7 |
HIP 11993 |
26.72 |
| 2026-10-10 00:00 |
02:34:16.11 |
+24:27:02.9 |
HIP 11993 |
27.01 |
| 2026-10-10 12:00 |
02:33:53.82 |
+24:27:11.8 |
HIP 11993 |
28.27 |
| 2026-10-11 00:00 |
02:33:31.08 |
+24:27:17.3 |
HIP 11993 |
30.44 |