235P/LINEAR
Metadata
| Parameter | Value |
|---|---|
| Designation | 235P/LINEAR |
| Type | P |
| Perihelion (tp_cal, UTC) | 2025-12-16T07:44:25.702080Z |
| Orbit solution date (soln_date, UTC) | 2026-07-28T14:12:25Z |
| Obs used | 1904 |
| NEO | - |
| M1 | 6.100 |
| K1 | 24.000 |
| PC | 0.030 |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-01-10.0000000 |
| e | 0.43097391 |
| q (au) | 1.975477 |
| a (au) | 3.471681 |
| i (deg) | 10.025817 |
| Ω (om, deg) | 201.108021 |
| ω (w, deg) | 350.383737 |
| M (ma, deg) | 252.378912 |
Magnitude
Scatter + Global Linear
$$ M_a = (7.909 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 7.909 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.837 |
| k | 0.999 |
| 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 | 2025-12-14 | +22.8478 | -8.516 |
| 2025-12-20 | 2026-08-04 | +2.3932 | -0.833 |
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) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 16:37:24.16 | -09:22:42.6 | HIP 81410 | 26.03 |
| 2026-07-29 12:00 | 16:37:33.27 | -09:24:40.7 | HIP 81410 | 23.87 |
| 2026-07-30 00:00 | 16:37:42.71 | -09:26:39.6 | HIP 81410 | 21.90 |
| 2026-07-30 12:00 | 16:37:52.49 | -09:28:39.3 | HIP 81410 | 20.20 |
| 2026-07-31 00:00 | 16:38:02.60 | -09:30:39.8 | HIP 81410 | 18.89 |
| 2026-07-31 12:00 | 16:38:13.03 | -09:32:41.0 | HIP 81410 | 18.08 |
| 2026-08-01 00:00 | 16:38:23.80 | -09:34:43.0 | HIP 81410 | 17.89 |
| 2026-08-01 12:00 | 16:38:34.89 | -09:36:45.7 | HIP 81580 | 16.22 |
| 2026-08-02 00:00 | 16:38:46.30 | -09:38:49.1 | HIP 81580 | 14.16 |
| 2026-08-02 12:00 | 16:38:58.03 | -09:40:53.2 | HIP 81580 | 12.68 |
| 2026-08-03 00:00 | 16:39:10.09 | -09:42:58.0 | HIP 81580 | 12.06 |
| 2026-08-03 12:00 | 16:39:22.46 | -09:45:03.3 | HIP 81580 | 12.50 |
| 2026-08-04 00:00 | 16:39:35.15 | -09:47:09.4 | HIP 81580 | 13.94 |
| 2026-08-04 12:00 | 16:39:48.16 | -09:49:16.0 | HIP 81580 | 16.17 |
| 2026-08-05 00:00 | 16:40:01.47 | -09:51:23.2 | HIP 81580 | 18.95 |
| 2026-08-05 12:00 | 16:40:15.10 | -09:53:30.9 | HIP 81580 | 22.12 |
| 2026-08-06 00:00 | 16:40:29.04 | -09:55:39.2 | HIP 81580 | 25.55 |
| 2026-08-06 12:00 | 16:40:43.29 | -09:57:48.0 | HIP 81580 | 29.20 |
| 2026-08-07 00:00 | 16:40:57.84 | -09:59:57.3 | HIP 81580 | 33.00 |
| 2026-08-07 12:00 | 16:41:12.70 | -10:02:07.1 | HIP 81869 | 31.84 |
| 2026-08-08 00:00 | 16:41:27.86 | -10:04:17.4 | HIP 81869 | 29.01 |
| 2026-08-08 12:00 | 16:41:43.33 | -10:06:28.1 | HIP 81869 | 26.52 |
| 2026-08-09 00:00 | 16:41:59.09 | -10:08:39.3 | HIP 81869 | 24.51 |
| 2026-08-09 12:00 | 16:42:15.16 | -10:10:50.8 | HIP 81869 | 23.16 |
| 2026-08-10 00:00 | 16:42:31.52 | -10:13:02.7 | HIP 81869 | 22.60 |
| 2026-08-10 12:00 | 16:42:48.18 | -10:15:15.0 | HIP 81869 | 22.96 |
| 2026-08-11 00:00 | 16:43:05.13 | -10:17:27.6 | HIP 81869 | 24.22 |
| 2026-08-11 12:00 | 16:43:22.37 | -10:19:40.6 | HIP 81869 | 26.29 |
| 2026-08-12 00:00 | 16:43:39.90 | -10:21:53.9 | HIP 81869 | 29.02 |
| 2026-08-12 12:00 | 16:43:57.73 | -10:24:07.4 | HIP 81869 | 32.29 |
| 2026-08-13 00:00 | 16:44:15.84 | -10:26:21.3 | HIP 82047 | 35.06 |
| 2026-08-13 12:00 | 16:44:34.23 | -10:28:35.4 | HIP 82047 | 30.78 |
| 2026-08-14 00:00 | 16:44:52.91 | -10:30:49.7 | HIP 82047 | 26.74 |
| 2026-08-14 12:00 | 16:45:11.87 | -10:33:04.2 | HIP 82047 | 23.10 |
| 2026-08-15 00:00 | 16:45:31.11 | -10:35:18.9 | HIP 82047 | 20.13 |
| 2026-08-15 12:00 | 16:45:50.62 | -10:37:33.7 | HIP 82047 | 18.23 |
| 2026-08-16 00:00 | 16:46:10.42 | -10:39:48.8 | HIP 82047 | 17.78 |
| 2026-08-16 12:00 | 16:46:30.48 | -10:42:03.9 | HIP 82197 | 18.81 |
| 2026-08-17 00:00 | 16:46:50.82 | -10:44:19.2 | HIP 82197 | 16.68 |
| 2026-08-17 12:00 | 16:47:11.42 | -10:46:34.5 | HIP 82197 | 16.18 |
| 2026-08-18 00:00 | 16:47:32.29 | -10:48:50.0 | HIP 82197 | 17.51 |
| 2026-08-18 12:00 | 16:47:53.43 | -10:51:05.5 | HIP 82197 | 20.38 |
| 2026-08-19 00:00 | 16:48:14.82 | -10:53:21.0 | HIP 82369 | 24.22 |