233P/La Sagra
| Parameter |
Value |
| Designation |
233P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-06-25T07:07:48.524160Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:54Z |
| Obs used |
164 |
| NEO |
- |
| M1 |
18.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-12-09.0000000 |
| e |
0.41109959 |
| q (au) |
1.784734 |
| a (au) |
3.030621 |
| i (deg) |
11.282834 |
| Ω (om, deg) |
74.928205 |
| ω (w, deg) |
27.173015 |
| M (ma, deg) |
99.515724 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.624 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.624 |
| n |
2.000 |
| gf |
0.850 |
| gb |
-0.500 |
| k |
0.987 |
| δ90 |
1.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
06:13:14.18 |
+37:13:54.1 |
HIP 29541 |
5.43 |
| 2026-02-03 12:00 |
06:13:24.12 |
+37:15:16.7 |
HIP 29541 |
5.87 |
| 2026-02-04 00:00 |
06:13:34.75 |
+37:16:36.0 |
HIP 29541 |
7.10 |
| 2026-02-04 12:00 |
06:13:46.07 |
+37:17:51.9 |
HIP 29541 |
8.88 |
| 2026-02-05 00:00 |
06:13:58.08 |
+37:19:04.6 |
HIP 29541 |
11.00 |
| 2026-02-05 12:00 |
06:14:10.78 |
+37:20:14.0 |
HIP 29541 |
13.36 |
| 2026-02-06 00:00 |
06:14:24.16 |
+37:21:20.2 |
HIP 29541 |
15.91 |
| 2026-02-06 12:00 |
06:14:38.22 |
+37:22:23.2 |
HIP 29541 |
18.61 |
| 2026-02-07 00:00 |
06:14:52.96 |
+37:23:23.0 |
HIP 29767 |
20.73 |
| 2026-02-07 12:00 |
06:15:08.38 |
+37:24:19.6 |
HIP 29767 |
17.98 |
| 2026-02-08 00:00 |
06:15:24.48 |
+37:25:13.2 |
HIP 29767 |
15.38 |
| 2026-02-08 12:00 |
06:15:41.26 |
+37:26:03.7 |
HIP 29767 |
13.10 |
| 2026-02-09 00:00 |
06:15:58.70 |
+37:26:51.1 |
HIP 29767 |
11.44 |
| 2026-02-09 12:00 |
06:16:16.82 |
+37:27:35.4 |
HIP 29767 |
10.82 |
| 2026-02-10 00:00 |
06:16:35.60 |
+37:28:16.8 |
HIP 29767 |
11.52 |
| 2026-02-10 12:00 |
06:16:55.05 |
+37:28:55.2 |
HIP 29767 |
13.43 |
| 2026-02-11 00:00 |
06:17:15.15 |
+37:29:30.6 |
HIP 29767 |
16.21 |
| 2026-02-11 12:00 |
06:17:35.92 |
+37:30:03.2 |
HIP 29767 |
19.58 |
| 2026-02-12 00:00 |
06:17:57.34 |
+37:30:32.8 |
HIP 29767 |
23.34 |
| 2026-02-12 12:00 |
06:18:19.41 |
+37:30:59.5 |
HIP 29767 |
27.38 |
| 2026-02-13 00:00 |
06:18:42.12 |
+37:31:23.4 |
HIP 30097 |
25.84 |
| 2026-02-13 12:00 |
06:19:05.49 |
+37:31:44.5 |
HIP 30097 |
23.57 |
| 2026-02-14 00:00 |
06:19:29.49 |
+37:32:02.7 |
HIP 30097 |
21.99 |
| 2026-02-14 12:00 |
06:19:54.13 |
+37:32:18.2 |
HIP 30097 |
21.32 |
| 2026-02-15 00:00 |
06:20:19.40 |
+37:32:30.9 |
HIP 30249 |
18.34 |
| 2026-02-15 12:00 |
06:20:45.30 |
+37:32:40.9 |
HIP 30249 |
13.64 |
| 2026-02-16 00:00 |
06:21:11.83 |
+37:32:48.2 |
HIP 30249 |
9.28 |
| 2026-02-16 12:00 |
06:21:38.98 |
+37:32:52.7 |
HIP 30249 |
6.38 |
| 2026-02-17 00:00 |
06:22:06.74 |
+37:32:54.6 |
HIP 30249 |
7.33 |
| 2026-02-17 12:00 |
06:22:35.11 |
+37:32:53.9 |
HIP 30249 |
11.36 |
| 2026-02-18 00:00 |
06:23:04.09 |
+37:32:50.5 |
HIP 30391 |
7.50 |
| 2026-02-18 12:00 |
06:23:33.67 |
+37:32:44.4 |
HIP 30391 |
6.18 |
| 2026-02-19 00:00 |
06:24:03.85 |
+37:32:35.8 |
HIP 30391 |
9.49 |
| 2026-02-19 12:00 |
06:24:34.62 |
+37:32:24.7 |
HIP 30484 |
13.46 |
| 2026-02-20 00:00 |
06:25:05.98 |
+37:32:10.9 |
HIP 30484 |
15.07 |
| 2026-02-20 12:00 |
06:25:37.92 |
+37:31:54.6 |
HIP 30484 |
18.79 |
| 2026-02-21 00:00 |
06:26:10.44 |
+37:31:35.8 |
HIP 30689 |
16.34 |
| 2026-02-21 12:00 |
06:26:43.52 |
+37:31:14.5 |
HIP 30689 |
13.50 |
| 2026-02-22 00:00 |
06:27:17.17 |
+37:30:50.7 |
HIP 30689 |
13.56 |
| 2026-02-22 12:00 |
06:27:51.38 |
+37:30:24.4 |
HIP 30689 |
16.62 |
| 2026-02-23 00:00 |
06:28:26.14 |
+37:29:55.7 |
HIP 30689 |
21.55 |
| 2026-02-23 12:00 |
06:29:01.44 |
+37:29:24.5 |
HIP 30689 |
27.44 |
| 2026-02-24 00:00 |
06:29:37.28 |
+37:28:50.9 |
HIP 31102 |
23.76 |