234P/LINEAR
| Parameter |
Value |
| Designation |
234P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-12-22T16:26:47.500800Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:30Z |
| Obs used |
377 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
22.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-04-28.0000000 |
| e |
0.25077789 |
| q (au) |
2.858038 |
| a (au) |
3.814674 |
| i (deg) |
11.516795 |
| Ω (om, deg) |
179.719928 |
| ω (w, deg) |
358.128979 |
| M (ma, deg) |
113.411811 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.435 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.435 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.675 |
| 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 |
18:32:26.26 |
-13:40:49.5 |
HIP 90784 |
30.88 |
| 2026-02-03 12:00 |
18:33:03.45 |
-13:39:41.2 |
HIP 91089 |
28.65 |
| 2026-02-04 00:00 |
18:33:40.54 |
-13:38:32.1 |
HIP 91089 |
20.43 |
| 2026-02-04 12:00 |
18:34:17.53 |
-13:37:22.3 |
HIP 91089 |
13.39 |
| 2026-02-05 00:00 |
18:34:54.42 |
-13:36:11.6 |
HIP 91089 |
10.26 |
| 2026-02-05 12:00 |
18:35:31.21 |
-13:35:00.2 |
HIP 91089 |
13.93 |
| 2026-02-06 00:00 |
18:36:07.90 |
-13:33:47.9 |
HIP 91194 |
16.27 |
| 2026-02-06 12:00 |
18:36:44.49 |
-13:32:34.9 |
HIP 91349 |
17.74 |
| 2026-02-07 00:00 |
18:37:20.98 |
-13:31:21.1 |
HIP 91349 |
8.87 |
| 2026-02-07 12:00 |
18:37:57.37 |
-13:30:06.6 |
HIP 91349 |
1.80 |
| 2026-02-08 00:00 |
18:38:33.65 |
-13:28:51.3 |
HIP 91349 |
9.32 |
| 2026-02-08 12:00 |
18:39:09.82 |
-13:27:35.2 |
HIP 91349 |
18.12 |
| 2026-02-09 00:00 |
18:39:45.89 |
-13:26:18.4 |
HIP 91597 |
16.20 |
| 2026-02-09 12:00 |
18:40:21.86 |
-13:25:00.8 |
HIP 91597 |
7.94 |
| 2026-02-10 00:00 |
18:40:57.71 |
-13:23:42.5 |
HIP 91608 |
1.03 |
| 2026-02-10 12:00 |
18:41:33.46 |
-13:22:23.4 |
HIP 91608 |
8.78 |
| 2026-02-11 00:00 |
18:42:09.10 |
-13:21:03.6 |
HIP 91608 |
17.52 |
| 2026-02-11 12:00 |
18:42:44.62 |
-13:19:43.1 |
HIP 91929 |
25.43 |
| 2026-02-12 00:00 |
18:43:20.04 |
-13:18:21.9 |
HIP 91929 |
16.80 |
| 2026-02-12 12:00 |
18:43:55.34 |
-13:16:59.9 |
HIP 91929 |
8.39 |
| 2026-02-13 00:00 |
18:44:30.53 |
-13:15:37.2 |
HIP 91929 |
3.11 |
| 2026-02-13 12:00 |
18:45:05.61 |
-13:14:13.8 |
HIP 92022 |
4.99 |
| 2026-02-14 00:00 |
18:45:40.57 |
-13:12:49.7 |
HIP 92022 |
3.94 |
| 2026-02-14 12:00 |
18:46:15.41 |
-13:11:24.9 |
HIP 92022 |
12.42 |
| 2026-02-15 00:00 |
18:46:50.14 |
-13:09:59.4 |
HIP 92022 |
20.97 |
| 2026-02-15 12:00 |
18:47:24.75 |
-13:08:33.3 |
HIP 92022 |
29.50 |
| 2026-02-16 00:00 |
18:47:59.23 |
-13:07:06.4 |
HIP 92309 |
36.01 |
| 2026-02-16 12:00 |
18:48:33.60 |
-13:05:38.9 |
HIP 92309 |
32.55 |
| 2026-02-17 00:00 |
18:49:07.85 |
-13:04:10.7 |
HIP 92309 |
31.07 |
| 2026-02-17 12:00 |
18:49:41.97 |
-13:02:41.8 |
HIP 92498 |
31.18 |
| 2026-02-18 00:00 |
18:50:15.97 |
-13:01:12.3 |
HIP 92498 |
28.08 |
| 2026-02-18 12:00 |
18:50:49.85 |
-12:59:42.2 |
HIP 92498 |
27.32 |
| 2026-02-19 00:00 |
18:51:23.60 |
-12:58:11.4 |
HIP 92498 |
29.07 |
| 2026-02-19 12:00 |
18:51:57.23 |
-12:56:39.9 |
HIP 92498 |
32.91 |
| 2026-02-20 00:00 |
18:52:30.72 |
-12:55:07.9 |
HIP 92783 |
28.21 |
| 2026-02-20 12:00 |
18:53:04.09 |
-12:53:35.2 |
HIP 92783 |
20.72 |
| 2026-02-21 00:00 |
18:53:37.33 |
-12:52:01.9 |
HIP 92783 |
14.19 |
| 2026-02-21 12:00 |
18:54:10.44 |
-12:50:28.0 |
HIP 92783 |
10.46 |
| 2026-02-22 00:00 |
18:54:43.42 |
-12:48:53.5 |
HIP 92783 |
12.35 |
| 2026-02-22 12:00 |
18:55:16.27 |
-12:47:18.4 |
HIP 92783 |
18.15 |
| 2026-02-23 00:00 |
18:55:48.99 |
-12:45:42.7 |
HIP 92783 |
25.26 |
| 2026-02-23 12:00 |
18:56:21.57 |
-12:44:06.5 |
HIP 93088 |
21.11 |
| 2026-02-24 00:00 |
18:56:54.02 |
-12:42:29.6 |
HIP 93088 |
13.95 |