224P/LINEAR-NEAT
| Parameter |
Value |
| Designation |
224P/LINEAR-NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2003-09-25T11:44:00.502080Z |
| Orbit solution date (soln_date, UTC) |
2024-05-30T01:12:28Z |
| Obs used |
107 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
18.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-03-19.0000000 |
| e |
0.43729725 |
| q (au) |
1.896039 |
| a (au) |
3.369521 |
| i (deg) |
14.873572 |
| Ω (om, deg) |
43.265140 |
| ω (w, deg) |
10.938819 |
| M (ma, deg) |
144.293100 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.775 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.775 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.981 |
| k |
1.000 |
| 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 |
16:33:24.67 |
-26:18:41.9 |
HIP 81118 |
14.49 |
| 2026-02-03 12:00 |
16:33:44.32 |
-26:20:09.1 |
HIP 81118 |
11.02 |
| 2026-02-04 00:00 |
16:34:03.83 |
-26:21:36.1 |
HIP 81118 |
8.71 |
| 2026-02-04 12:00 |
16:34:23.21 |
-26:23:02.9 |
HIP 81118 |
8.51 |
| 2026-02-05 00:00 |
16:34:42.45 |
-26:24:29.5 |
HIP 81190 |
4.61 |
| 2026-02-05 12:00 |
16:35:01.56 |
-26:25:55.9 |
HIP 81190 |
0.13 |
| 2026-02-06 00:00 |
16:35:20.53 |
-26:27:22.0 |
HIP 81211 |
1.79 |
| 2026-02-06 12:00 |
16:35:39.35 |
-26:28:48.0 |
HIP 81211 |
5.40 |
| 2026-02-07 00:00 |
16:35:58.04 |
-26:30:13.8 |
HIP 81211 |
9.70 |
| 2026-02-07 12:00 |
16:36:16.58 |
-26:31:39.3 |
HIP 81211 |
14.04 |
| 2026-02-08 00:00 |
16:36:34.98 |
-26:33:04.7 |
HIP 81211 |
18.37 |
| 2026-02-08 12:00 |
16:36:53.23 |
-26:34:29.8 |
HIP 81211 |
22.68 |
| 2026-02-09 00:00 |
16:37:11.34 |
-26:35:54.8 |
HIP 81211 |
26.96 |
| 2026-02-09 12:00 |
16:37:29.30 |
-26:37:19.5 |
HIP 81487 |
26.63 |
| 2026-02-10 00:00 |
16:37:47.11 |
-26:38:44.1 |
HIP 81487 |
23.36 |
| 2026-02-10 12:00 |
16:38:04.77 |
-26:40:08.5 |
HIP 81487 |
20.46 |
| 2026-02-11 00:00 |
16:38:22.28 |
-26:41:32.6 |
HIP 81487 |
18.09 |
| 2026-02-11 12:00 |
16:38:39.63 |
-26:42:56.6 |
HIP 81487 |
16.43 |
| 2026-02-12 00:00 |
16:38:56.83 |
-26:44:20.3 |
HIP 81487 |
15.70 |
| 2026-02-12 12:00 |
16:39:13.88 |
-26:45:43.9 |
HIP 81487 |
16.00 |
| 2026-02-13 00:00 |
16:39:30.77 |
-26:47:07.3 |
HIP 81487 |
17.24 |
| 2026-02-13 12:00 |
16:39:47.49 |
-26:48:30.5 |
HIP 81487 |
19.23 |
| 2026-02-14 00:00 |
16:40:04.06 |
-26:49:53.5 |
HIP 81487 |
21.74 |
| 2026-02-14 12:00 |
16:40:20.47 |
-26:51:16.3 |
HIP 81617 |
24.12 |
| 2026-02-15 00:00 |
16:40:36.72 |
-26:52:38.9 |
HIP 81747 |
21.25 |
| 2026-02-15 12:00 |
16:40:52.80 |
-26:54:01.3 |
HIP 81747 |
17.67 |
| 2026-02-16 00:00 |
16:41:08.72 |
-26:55:23.6 |
HIP 81747 |
14.25 |
| 2026-02-16 12:00 |
16:41:24.47 |
-26:56:45.6 |
HIP 81747 |
11.10 |
| 2026-02-17 00:00 |
16:41:40.06 |
-26:58:07.5 |
HIP 81747 |
8.48 |
| 2026-02-17 12:00 |
16:41:55.47 |
-26:59:29.2 |
HIP 81747 |
6.95 |
| 2026-02-18 00:00 |
16:42:10.71 |
-27:00:50.7 |
HIP 81747 |
7.20 |
| 2026-02-18 12:00 |
16:42:25.79 |
-27:02:12.0 |
HIP 81747 |
9.02 |
| 2026-02-19 00:00 |
16:42:40.69 |
-27:03:33.1 |
HIP 81821 |
7.83 |
| 2026-02-19 12:00 |
16:42:55.41 |
-27:04:54.1 |
HIP 81821 |
6.63 |
| 2026-02-20 00:00 |
16:43:09.96 |
-27:06:14.8 |
HIP 81821 |
7.16 |
| 2026-02-20 12:00 |
16:43:24.34 |
-27:07:35.4 |
HIP 81821 |
9.08 |
| 2026-02-21 00:00 |
16:43:38.53 |
-27:08:55.8 |
HIP 81821 |
11.70 |
| 2026-02-21 12:00 |
16:43:52.55 |
-27:10:16.0 |
HIP 81821 |
14.61 |
| 2026-02-22 00:00 |
16:44:06.39 |
-27:11:36.1 |
HIP 81939 |
15.96 |
| 2026-02-22 12:00 |
16:44:20.04 |
-27:12:56.0 |
HIP 81939 |
14.45 |
| 2026-02-23 00:00 |
16:44:33.52 |
-27:14:15.7 |
HIP 81939 |
13.59 |
| 2026-02-23 12:00 |
16:44:46.81 |
-27:15:35.2 |
HIP 81981 |
11.80 |
| 2026-02-24 00:00 |
16:44:59.91 |
-27:16:54.5 |
HIP 81981 |
10.69 |