24P/Schaumasse
Metadata
| Parameter | Value |
|---|---|
| Designation | 24P/Schaumasse |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-11-15T01:44:30.592320Z |
| Orbit solution date (soln_date, UTC) | 2026-01-13T22:29:19Z |
| Obs used | 1626 |
| NEO | Yes |
| M1 | 14.500 |
| K1 | 10.750 |
| PC | - |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2021-03-14.0000000 |
| e | 0.70880055 |
| q (au) | 1.180240 |
| a (au) | 4.053031 |
| i (deg) | 11.572194 |
| Ω (om, deg) | 78.847571 |
| ω (w, deg) | 58.073128 |
| M (ma, deg) | 146.752179 |
Magnitude
Scatter + Global Linear
$$ M_a = (9.352 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 9.352 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.500 |
| 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 |
|---|---|---|---|
| 2025-08-24 | 2025-11-03 | +36.6681 | -3.300 |
| 2025-11-03 | 2026-02-09 | +7.3705 | +1.619 |
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 | 14:43:13.68 | +08:35:20.3 | HIP 71946 | 31.11 |
| 2026-02-03 12:00 | 14:44:25.36 | +08:31:24.5 | HIP 72162 | 27.97 |
| 2026-02-04 00:00 | 14:45:36.09 | +08:27:31.6 | HIP 72162 | 17.94 |
| 2026-02-04 12:00 | 14:46:45.87 | +08:23:41.6 | HIP 72311 | 10.10 |
| 2026-02-05 00:00 | 14:47:54.70 | +08:19:54.6 | HIP 72297 | 14.27 |
| 2026-02-05 12:00 | 14:49:02.58 | +08:16:10.6 | HIP 72527 | 19.60 |
| 2026-02-06 00:00 | 14:50:09.51 | +08:12:29.5 | HIP 72527 | 14.91 |
| 2026-02-06 12:00 | 14:51:15.48 | +08:08:51.4 | HIP 72715 | 11.98 |
| 2026-02-07 00:00 | 14:52:20.51 | +08:05:16.2 | HIP 72715 | 9.45 |
| 2026-02-07 12:00 | 14:53:24.59 | +08:01:43.9 | HIP 72861 | 20.45 |
| 2026-02-08 00:00 | 14:54:27.71 | +07:58:14.6 | HIP 72933 | 17.71 |
| 2026-02-08 12:00 | 14:55:29.88 | +07:54:48.2 | HIP 73025 | 9.12 |
| 2026-02-09 00:00 | 14:56:31.10 | +07:51:24.7 | HIP 73025 | 16.98 |
| 2026-02-09 12:00 | 14:57:31.37 | +07:48:04.2 | HIP 73212 | 8.92 |
| 2026-02-10 00:00 | 14:58:30.68 | +07:44:46.5 | HIP 73212 | 12.30 |
| 2026-02-10 12:00 | 14:59:29.04 | +07:41:31.6 | HIP 73424 | 12.58 |
| 2026-02-11 00:00 | 15:00:26.44 | +07:38:19.7 | HIP 73424 | 2.01 |
| 2026-02-11 12:00 | 15:01:22.89 | +07:35:10.6 | HIP 73424 | 16.34 |
| 2026-02-12 00:00 | 15:02:18.38 | +07:32:04.3 | HIP 73641 | 15.11 |
| 2026-02-12 12:00 | 15:03:12.92 | +07:29:00.8 | HIP 73641 | 11.32 |
| 2026-02-13 00:00 | 15:04:06.49 | +07:26:00.0 | HIP 73802 | 18.00 |
| 2026-02-13 12:00 | 15:04:59.12 | +07:23:02.0 | HIP 73802 | 8.68 |
| 2026-02-14 00:00 | 15:05:50.78 | +07:20:06.8 | HIP 73802 | 13.40 |
| 2026-02-14 12:00 | 15:06:41.48 | +07:17:14.3 | HIP 73952 | 20.49 |
| 2026-02-15 00:00 | 15:07:31.23 | +07:14:24.4 | HIP 73952 | 26.07 |
| 2026-02-15 12:00 | 15:08:20.02 | +07:11:37.1 | HIP 73952 | 35.30 |
| 2026-02-16 00:00 | 15:09:07.84 | +07:08:52.5 | HIP 74288 | 29.86 |
| 2026-02-16 12:00 | 15:09:54.71 | +07:06:10.4 | HIP 74288 | 21.03 |
| 2026-02-17 00:00 | 15:10:40.61 | +07:03:30.9 | HIP 74288 | 16.69 |
| 2026-02-17 12:00 | 15:11:25.55 | +07:00:53.9 | HIP 74288 | 19.59 |
| 2026-02-18 00:00 | 15:12:09.54 | +06:58:19.4 | HIP 74444 | 13.93 |
| 2026-02-18 12:00 | 15:12:52.56 | +06:55:47.2 | HIP 74444 | 7.76 |
| 2026-02-19 00:00 | 15:13:34.61 | +06:53:17.5 | HIP 74444 | 12.73 |
| 2026-02-19 12:00 | 15:14:15.71 | +06:50:50.1 | HIP 74444 | 22.00 |
| 2026-02-20 00:00 | 15:14:55.85 | +06:48:25.0 | HIP 74695 | 25.03 |
| 2026-02-20 12:00 | 15:15:35.02 | +06:46:02.2 | HIP 74695 | 18.72 |
| 2026-02-21 00:00 | 15:16:13.24 | +06:43:41.5 | HIP 74695 | 16.54 |
| 2026-02-21 12:00 | 15:16:50.49 | +06:41:23.1 | HIP 74848 | 16.79 |
| 2026-02-22 00:00 | 15:17:26.79 | +06:39:06.7 | HIP 74848 | 9.18 |
| 2026-02-22 12:00 | 15:18:02.12 | +06:36:52.5 | HIP 74848 | 7.57 |
| 2026-02-23 00:00 | 15:18:36.50 | +06:34:40.3 | HIP 74848 | 13.73 |
| 2026-02-23 12:00 | 15:19:09.93 | +06:32:30.0 | HIP 74848 | 21.56 |
| 2026-02-24 00:00 | 15:19:42.39 | +06:30:21.7 | HIP 74997 | 24.11 |