235P/LINEAR
Metadata
| Parameter | Value |
|---|---|
| Designation | 235P/LINEAR |
| Type | P |
| Perihelion (tp_cal, UTC) | 2018-03-21T16:08:29.486400Z |
| Orbit solution date (soln_date, UTC) | 2026-05-08T13:42:12Z |
| Obs used | 1069 |
| NEO | - |
| M1 | 5.100 |
| K1 | 27.750 |
| PC | 0.030 |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2022-02-17.0000000 |
| e | 0.32866964 |
| q (au) | 2.650636 |
| a (au) | 3.948333 |
| i (deg) | 9.042576 |
| Ω (om, deg) | 202.930957 |
| ω (w, deg) | 333.430184 |
| M (ma, deg) | 179.436684 |
Magnitude
Scatter + Global Linear
$$ M_a = (7.648 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 7.648 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.998 |
| 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 | 2026-05-02 | +25.5075 | -8.138 |
| 2026-05-02 | 2026-05-18 | +16.1817 | -5.403 |
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) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 17:11:56.23 | -10:46:58.9 | HIP 84026 | 20.32 |
| 2026-05-12 12:00 | 17:11:39.63 | -10:43:36.1 | HIP 84026 | 17.89 |
| 2026-05-13 00:00 | 17:11:22.70 | -10:40:14.5 | HIP 84026 | 16.76 |
| 2026-05-13 12:00 | 17:11:05.44 | -10:36:54.2 | HIP 84026 | 17.23 |
| 2026-05-14 00:00 | 17:10:47.85 | -10:33:35.3 | HIP 83962 | 14.89 |
| 2026-05-14 12:00 | 17:10:29.94 | -10:30:17.7 | HIP 83962 | 10.39 |
| 2026-05-15 00:00 | 17:10:11.72 | -10:27:01.6 | HIP 83962 | 7.29 |
| 2026-05-15 12:00 | 17:09:53.20 | -10:23:47.0 | HIP 83962 | 7.71 |
| 2026-05-16 00:00 | 17:09:34.39 | -10:20:33.8 | HIP 83962 | 11.32 |
| 2026-05-16 12:00 | 17:09:15.28 | -10:17:22.2 | HIP 83962 | 16.15 |
| 2026-05-17 00:00 | 17:08:55.90 | -10:14:12.2 | HIP 83962 | 21.42 |
| 2026-05-17 12:00 | 17:08:36.25 | -10:11:03.8 | HIP 83962 | 26.90 |
| 2026-05-18 00:00 | 17:08:16.34 | -10:07:57.1 | HIP 83756 | 26.97 |
| 2026-05-18 12:00 | 17:07:56.17 | -10:04:52.0 | HIP 83756 | 21.47 |
| 2026-05-19 00:00 | 17:07:35.76 | -10:01:48.7 | HIP 83756 | 16.20 |
| 2026-05-19 12:00 | 17:07:15.11 | -09:58:47.2 | HIP 83756 | 11.57 |
| 2026-05-20 00:00 | 17:06:54.24 | -09:55:47.5 | HIP 83756 | 8.70 |
| 2026-05-20 12:00 | 17:06:33.14 | -09:52:49.7 | HIP 83756 | 9.47 |
| 2026-05-21 00:00 | 17:06:11.84 | -09:49:53.7 | HIP 83756 | 13.29 |
| 2026-05-21 12:00 | 17:05:50.34 | -09:46:59.6 | HIP 83605 | 11.88 |
| 2026-05-22 00:00 | 17:05:28.65 | -09:44:07.5 | HIP 83605 | 6.68 |
| 2026-05-22 12:00 | 17:05:06.77 | -09:41:17.3 | HIP 83605 | 4.72 |
| 2026-05-23 00:00 | 17:04:44.73 | -09:38:29.2 | HIP 83605 | 8.66 |
| 2026-05-23 12:00 | 17:04:22.51 | -09:35:43.1 | HIP 83605 | 14.27 |
| 2026-05-24 00:00 | 17:04:00.14 | -09:32:59.1 | HIP 83605 | 20.21 |
| 2026-05-24 12:00 | 17:03:37.63 | -09:30:17.1 | HIP 83605 | 26.28 |
| 2026-05-25 00:00 | 17:03:14.97 | -09:27:37.3 | HIP 83440 | 26.57 |
| 2026-05-25 12:00 | 17:02:52.19 | -09:24:59.7 | HIP 83440 | 24.51 |
| 2026-05-26 00:00 | 17:02:29.29 | -09:22:24.2 | HIP 83440 | 23.98 |
| 2026-05-26 12:00 | 17:02:06.27 | -09:19:50.9 | HIP 83440 | 25.08 |
| 2026-05-27 00:00 | 17:01:43.15 | -09:17:19.9 | HIP 83440 | 27.62 |
| 2026-05-27 12:00 | 17:01:19.94 | -09:14:51.1 | HIP 83298 | 29.98 |
| 2026-05-28 00:00 | 17:00:56.64 | -09:12:24.6 | HIP 83298 | 33.20 |
| 2026-05-28 12:00 | 17:00:33.26 | -09:10:00.4 | HIP 83298 | 37.17 |
| 2026-05-29 00:00 | 17:00:09.81 | -09:07:38.6 | HIP 83103 | 35.66 |
| 2026-05-29 12:00 | 16:59:46.31 | -09:05:19.1 | HIP 83103 | 30.87 |
| 2026-05-30 00:00 | 16:59:22.75 | -09:03:02.0 | HIP 83103 | 26.74 |
| 2026-05-30 12:00 | 16:58:59.16 | -09:00:47.3 | HIP 83103 | 23.60 |
| 2026-05-31 00:00 | 16:58:35.52 | -08:58:35.0 | HIP 83103 | 21.88 |
| 2026-05-31 12:00 | 16:58:11.87 | -08:56:25.1 | HIP 83103 | 21.91 |
| 2026-06-01 00:00 | 16:57:48.19 | -08:54:17.8 | HIP 83103 | 23.68 |
| 2026-06-01 12:00 | 16:57:24.51 | -08:52:12.9 | HIP 82835 | 26.11 |
| 2026-06-02 00:00 | 16:57:00.82 | -08:50:10.5 | HIP 82835 | 20.90 |