235P/LINEAR
Metadata
| Parameter | Value |
|---|---|
| Designation | 235P/LINEAR |
| Type | P |
| Perihelion (tp_cal, UTC) | 2018-03-17T05:13:51.147840Z |
| Orbit solution date (soln_date, UTC) | 2026-01-13T08:12:54Z |
| Obs used | 399 |
| NEO | - |
| M1 | 6.600 |
| K1 | 23.500 |
| PC | 0.030 |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2015-12-08.0000000 |
| e | 0.31511521 |
| q (au) | 2.734715 |
| a (au) | 3.992957 |
| i (deg) | 8.902979 |
| Ω (om, deg) | 204.453086 |
| ω (w, deg) | 333.651888 |
| M (ma, deg) | 257.445605 |
Magnitude
Scatter + Global Linear
$$ M_a = (7.292 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 7.292 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.502 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) | End (UTC) | a | b |
|---|---|---|---|
| 2024-11-21 | 2026-02-09 | +17.1808 | -5.446 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Finding Chart
Ephemeris
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 15:46:01.64 | -18:09:22.1 | HIP 77225 | 1.03 |
| 2026-02-03 12:00 | 15:47:01.28 | -18:10:09.8 | HIP 77328 | 9.06 |
| 2026-02-04 00:00 | 15:48:00.73 | -18:10:55.1 | HIP 77328 | 14.40 |
| 2026-02-04 12:00 | 15:49:00.01 | -18:11:37.9 | HIP 77554 | 15.32 |
| 2026-02-05 00:00 | 15:49:59.10 | -18:12:18.3 | HIP 77554 | 3.87 |
| 2026-02-05 12:00 | 15:50:58.00 | -18:12:56.2 | HIP 77554 | 13.73 |
| 2026-02-06 00:00 | 15:51:56.71 | -18:13:31.7 | HIP 77740 | 13.57 |
| 2026-02-06 12:00 | 15:52:55.22 | -18:14:04.8 | HIP 77740 | 15.04 |
| 2026-02-07 00:00 | 15:53:53.55 | -18:14:35.4 | HIP 77926 | 16.54 |
| 2026-02-07 12:00 | 15:54:51.67 | -18:15:03.6 | HIP 77926 | 8.66 |
| 2026-02-08 00:00 | 15:55:49.59 | -18:15:29.3 | HIP 78018 | 13.71 |
| 2026-02-08 12:00 | 15:56:47.31 | -18:15:52.6 | HIP 78018 | 19.63 |
| 2026-02-09 00:00 | 15:57:44.82 | -18:16:13.5 | HIP 78219 | 15.27 |
| 2026-02-09 12:00 | 15:58:42.12 | -18:16:31.9 | HIP 78314 | 10.60 |
| 2026-02-10 00:00 | 15:59:39.21 | -18:16:47.9 | HIP 78314 | 3.46 |
| 2026-02-10 12:00 | 16:00:36.08 | -18:17:01.5 | HIP 78314 | 16.65 |
| 2026-02-11 00:00 | 16:01:32.74 | -18:17:12.6 | HIP 78573 | 17.07 |
| 2026-02-11 12:00 | 16:02:29.17 | -18:17:21.3 | HIP 78573 | 7.39 |
| 2026-02-12 00:00 | 16:03:25.38 | -18:17:27.6 | HIP 78573 | 13.24 |
| 2026-02-12 12:00 | 16:04:21.37 | -18:17:31.5 | HIP 78785 | 17.82 |
| 2026-02-13 00:00 | 16:05:17.13 | -18:17:32.9 | HIP 78785 | 15.19 |
| 2026-02-13 12:00 | 16:06:12.65 | -18:17:31.9 | HIP 78984 | 16.96 |
| 2026-02-14 00:00 | 16:07:07.94 | -18:17:28.5 | HIP 78984 | 5.57 |
| 2026-02-14 12:00 | 16:08:03.00 | -18:17:22.7 | HIP 79048 | 2.97 |
| 2026-02-15 00:00 | 16:08:57.81 | -18:17:14.5 | HIP 79048 | 12.33 |
| 2026-02-15 12:00 | 16:09:52.38 | -18:17:03.9 | HIP 79203 | 3.43 |
| 2026-02-16 00:00 | 16:10:46.70 | -18:16:50.9 | HIP 79203 | 12.71 |
| 2026-02-16 12:00 | 16:11:40.78 | -18:16:35.5 | HIP 79377 | 5.78 |
| 2026-02-17 00:00 | 16:12:34.60 | -18:16:17.7 | HIP 79377 | 7.99 |
| 2026-02-17 12:00 | 16:13:28.17 | -18:15:57.5 | HIP 79565 | 9.84 |
| 2026-02-18 00:00 | 16:14:21.48 | -18:15:34.9 | HIP 79565 | 5.29 |
| 2026-02-18 12:00 | 16:15:14.54 | -18:15:10.0 | HIP 79565 | 16.66 |
| 2026-02-19 00:00 | 16:16:07.32 | -18:14:42.7 | HIP 79732 | 21.43 |
| 2026-02-19 12:00 | 16:16:59.85 | -18:14:13.0 | HIP 79750 | 23.09 |
| 2026-02-20 00:00 | 16:17:52.10 | -18:13:41.0 | HIP 79750 | 28.93 |
| 2026-02-20 12:00 | 16:18:44.09 | -18:13:06.6 | HIP 80061 | 37.75 |
| 2026-02-21 00:00 | 16:19:35.80 | -18:12:29.9 | HIP 80061 | 31.59 |
| 2026-02-21 12:00 | 16:20:27.24 | -18:11:50.9 | HIP 80061 | 29.57 |
| 2026-02-22 00:00 | 16:21:18.40 | -18:11:09.5 | HIP 80165 | 24.28 |
| 2026-02-22 12:00 | 16:22:09.28 | -18:10:25.9 | HIP 80165 | 23.97 |
| 2026-02-23 00:00 | 16:22:59.87 | -18:09:39.9 | HIP 80165 | 29.19 |
| 2026-02-23 12:00 | 16:23:50.18 | -18:08:51.6 | HIP 80378 | 25.60 |
| 2026-02-24 00:00 | 16:24:40.20 | -18:08:01.0 | HIP 80378 | 23.55 |