| Parameter |
Value |
| Designation |
228P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-08-23T22:00:38.856960Z |
| Orbit solution date (soln_date, UTC) |
2025-10-28T16:12:51Z |
| Obs used |
436 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
13.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-04-14.0000000 |
| e |
0.17695985 |
| q (au) |
3.430453 |
| a (au) |
4.168026 |
| i (deg) |
7.915353 |
| Ω (om, deg) |
31.066132 |
| ω (w, deg) |
114.805864 |
| M (ma, deg) |
344.720485 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.998 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.998 |
| n |
6.000 |
| gf |
0.994 |
| gb |
-0.718 |
| 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) |
| 2026-03-26 00:00 |
01:15:59.45 |
+07:07:41.7 |
HIP 5884 |
12.18 |
| 2026-03-26 12:00 |
01:16:27.61 |
+07:10:54.9 |
HIP 6038 |
16.69 |
| 2026-03-27 00:00 |
01:16:55.81 |
+07:14:08.2 |
HIP 6038 |
10.87 |
| 2026-03-27 12:00 |
01:17:24.04 |
+07:17:21.5 |
HIP 6038 |
8.75 |
| 2026-03-28 00:00 |
01:17:52.31 |
+07:20:34.8 |
HIP 6038 |
12.40 |
| 2026-03-28 12:00 |
01:18:20.62 |
+07:23:48.0 |
HIP 6154 |
9.35 |
| 2026-03-29 00:00 |
01:18:48.96 |
+07:27:01.3 |
HIP 6154 |
2.42 |
| 2026-03-29 12:00 |
01:19:17.33 |
+07:30:14.6 |
HIP 6205 |
3.95 |
| 2026-03-30 00:00 |
01:19:45.73 |
+07:33:27.9 |
HIP 6205 |
5.12 |
| 2026-03-30 12:00 |
01:20:14.17 |
+07:36:41.1 |
HIP 6307 |
12.24 |
| 2026-03-31 00:00 |
01:20:42.64 |
+07:39:54.3 |
HIP 6307 |
6.28 |
| 2026-03-31 12:00 |
01:21:11.14 |
+07:43:07.6 |
HIP 6307 |
7.02 |
| 2026-04-01 00:00 |
01:21:39.67 |
+07:46:20.7 |
HIP 6307 |
13.41 |
| 2026-04-01 12:00 |
01:22:08.23 |
+07:49:33.9 |
HIP 6307 |
20.76 |
| 2026-04-02 00:00 |
01:22:36.82 |
+07:52:47.0 |
HIP 6513 |
24.31 |
| 2026-04-02 12:00 |
01:23:05.44 |
+07:56:00.1 |
HIP 6513 |
17.60 |
| 2026-04-03 00:00 |
01:23:34.09 |
+07:59:13.2 |
HIP 6513 |
12.23 |
| 2026-04-03 12:00 |
01:24:02.77 |
+08:02:26.2 |
HIP 6513 |
10.53 |
| 2026-04-04 00:00 |
01:24:31.48 |
+08:05:39.2 |
HIP 6513 |
13.92 |
| 2026-04-04 12:00 |
01:25:00.22 |
+08:08:52.1 |
HIP 6570 |
19.42 |
| 2026-04-05 00:00 |
01:25:28.98 |
+08:12:05.0 |
HIP 6570 |
21.21 |
| 2026-04-05 12:00 |
01:25:57.77 |
+08:15:17.9 |
HIP 6738 |
23.91 |
| 2026-04-06 00:00 |
01:26:26.59 |
+08:18:30.6 |
HIP 6738 |
18.25 |
| 2026-04-06 12:00 |
01:26:55.43 |
+08:21:43.3 |
HIP 6738 |
14.74 |
| 2026-04-07 00:00 |
01:27:24.30 |
+08:24:56.0 |
HIP 6738 |
14.96 |
| 2026-04-07 12:00 |
01:27:53.20 |
+08:28:08.6 |
HIP 6738 |
18.79 |
| 2026-04-08 00:00 |
01:28:22.11 |
+08:31:21.1 |
HIP 6954 |
19.11 |
| 2026-04-08 12:00 |
01:28:51.06 |
+08:34:33.5 |
HIP 6972 |
15.32 |
| 2026-04-09 00:00 |
01:29:20.02 |
+08:37:45.9 |
HIP 6972 |
12.65 |
| 2026-04-09 12:00 |
01:29:49.01 |
+08:40:58.1 |
HIP 6972 |
14.44 |
| 2026-04-10 00:00 |
01:30:18.03 |
+08:44:10.3 |
HIP 6972 |
19.50 |
| 2026-04-10 12:00 |
01:30:47.06 |
+08:47:22.4 |
HIP 6972 |
25.99 |
| 2026-04-11 00:00 |
01:31:16.12 |
+08:50:34.4 |
HIP 6972 |
33.08 |
| 2026-04-11 12:00 |
01:31:45.20 |
+08:53:46.3 |
HIP 7293 |
32.77 |
| 2026-04-12 00:00 |
01:32:14.30 |
+08:56:58.1 |
HIP 7293 |
25.20 |
| 2026-04-12 12:00 |
01:32:43.42 |
+09:00:09.8 |
HIP 7293 |
17.87 |
| 2026-04-13 00:00 |
01:33:12.56 |
+09:03:21.4 |
HIP 7293 |
11.31 |
| 2026-04-13 12:00 |
01:33:41.71 |
+09:06:32.9 |
HIP 7293 |
7.75 |
| 2026-04-14 00:00 |
01:34:10.89 |
+09:09:44.2 |
HIP 7293 |
10.79 |
| 2026-04-14 12:00 |
01:34:40.09 |
+09:12:55.5 |
HIP 7293 |
17.23 |
| 2026-04-15 00:00 |
01:35:09.30 |
+09:16:06.6 |
HIP 7293 |
24.52 |
| 2026-04-15 12:00 |
01:35:38.53 |
+09:19:17.6 |
HIP 7561 |
30.83 |
| 2026-04-16 00:00 |
01:36:07.77 |
+09:22:28.4 |
HIP 7561 |
23.06 |