| Parameter |
Value |
| Designation |
424P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-08-16T14:00:44.933760Z |
| Orbit solution date (soln_date, UTC) |
2022-02-14T01:12:55Z |
| Obs used |
614 |
| NEO |
- |
| M1 |
17.800 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-06-06T12:36:39.744000Z |
| Discovery magnitude (MPC) |
20.60 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-05-02.0000000 |
| e |
0.69277912 |
| q (au) |
1.351983 |
| a (au) |
4.400689 |
| i (deg) |
8.637783 |
| Ω (om, deg) |
51.619990 |
| ω (w, deg) |
312.445906 |
| M (ma, deg) |
144.602315 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.866 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.866 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.862 |
| k |
0.990 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
11:55:48.24 |
+07:49:01.2 |
HIP 58372 |
38.56 |
| 2026-06-01 12:00 |
11:55:46.30 |
+07:48:38.9 |
HIP 58372 |
38.84 |
| 2026-06-02 00:00 |
11:55:44.49 |
+07:48:15.7 |
HIP 58372 |
39.10 |
| 2026-06-02 12:00 |
11:55:42.80 |
+07:47:51.8 |
HIP 58372 |
39.33 |
| 2026-06-03 00:00 |
11:55:41.23 |
+07:47:27.0 |
HIP 58372 |
39.53 |
| 2026-06-03 12:00 |
11:55:39.79 |
+07:47:01.5 |
HIP 58372 |
39.71 |
| 2026-06-04 00:00 |
11:55:38.48 |
+07:46:35.1 |
HIP 58372 |
39.86 |
| 2026-06-04 12:00 |
11:55:37.29 |
+07:46:08.0 |
HIP 58372 |
39.98 |
| 2026-06-05 00:00 |
11:55:36.22 |
+07:45:40.0 |
HIP 58372 |
40.08 |
| 2026-06-05 12:00 |
11:55:35.28 |
+07:45:11.3 |
HIP 58372 |
40.15 |
| 2026-06-06 00:00 |
11:55:34.46 |
+07:44:41.8 |
HIP 58372 |
40.19 |
| 2026-06-06 12:00 |
11:55:33.77 |
+07:44:11.6 |
HIP 58372 |
40.21 |
| 2026-06-07 00:00 |
11:55:33.20 |
+07:43:40.5 |
HIP 58372 |
40.20 |
| 2026-06-07 12:00 |
11:55:32.75 |
+07:43:08.7 |
HIP 58372 |
40.17 |
| 2026-06-08 00:00 |
11:55:32.43 |
+07:42:36.1 |
HIP 58372 |
40.11 |
| 2026-06-08 12:00 |
11:55:32.23 |
+07:42:02.8 |
HIP 58372 |
40.03 |
| 2026-06-09 00:00 |
11:55:32.16 |
+07:41:28.7 |
HIP 58372 |
39.92 |
| 2026-06-09 12:00 |
11:55:32.20 |
+07:40:53.8 |
HIP 58372 |
39.79 |
| 2026-06-10 00:00 |
11:55:32.38 |
+07:40:18.1 |
HIP 58372 |
39.63 |
| 2026-06-10 12:00 |
11:55:32.67 |
+07:39:41.8 |
HIP 58372 |
39.45 |
| 2026-06-11 00:00 |
11:55:33.09 |
+07:39:04.6 |
HIP 58372 |
39.24 |
| 2026-06-11 12:00 |
11:55:33.63 |
+07:38:26.7 |
HIP 58372 |
39.01 |
| 2026-06-12 00:00 |
11:55:34.29 |
+07:37:48.1 |
HIP 58372 |
38.76 |
| 2026-06-12 12:00 |
11:55:35.07 |
+07:37:08.7 |
HIP 58372 |
38.49 |
| 2026-06-13 00:00 |
11:55:35.98 |
+07:36:28.6 |
HIP 58372 |
38.20 |
| 2026-06-13 12:00 |
11:55:37.00 |
+07:35:47.7 |
HIP 58372 |
37.88 |
| 2026-06-14 00:00 |
11:55:38.15 |
+07:35:06.2 |
HIP 58372 |
37.55 |
| 2026-06-14 12:00 |
11:55:39.42 |
+07:34:23.8 |
HIP 58372 |
37.20 |
| 2026-06-15 00:00 |
11:55:40.82 |
+07:33:40.8 |
HIP 58372 |
36.83 |
| 2026-06-15 12:00 |
11:55:42.33 |
+07:32:57.0 |
HIP 58372 |
36.45 |
| 2026-06-16 00:00 |
11:55:43.96 |
+07:32:12.6 |
HIP 58372 |
36.05 |
| 2026-06-16 12:00 |
11:55:45.71 |
+07:31:27.4 |
HIP 58372 |
35.63 |
| 2026-06-17 00:00 |
11:55:47.58 |
+07:30:41.5 |
HIP 58372 |
35.21 |
| 2026-06-17 12:00 |
11:55:49.57 |
+07:29:54.9 |
HIP 58372 |
34.77 |
| 2026-06-18 00:00 |
11:55:51.68 |
+07:29:07.6 |
HIP 58372 |
34.32 |
| 2026-06-18 12:00 |
11:55:53.91 |
+07:28:19.6 |
HIP 58372 |
33.87 |
| 2026-06-19 00:00 |
11:55:56.26 |
+07:27:30.9 |
HIP 58372 |
33.41 |
| 2026-06-19 12:00 |
11:55:58.72 |
+07:26:41.6 |
HIP 58372 |
32.95 |
| 2026-06-20 00:00 |
11:56:01.30 |
+07:25:51.5 |
HIP 58372 |
32.49 |
| 2026-06-20 12:00 |
11:56:04.00 |
+07:25:00.8 |
HIP 58372 |
32.04 |
| 2026-06-21 00:00 |
11:56:06.81 |
+07:24:09.4 |
HIP 58372 |
31.58 |
| 2026-06-21 12:00 |
11:56:09.74 |
+07:23:17.4 |
HIP 58372 |
31.14 |
| 2026-06-22 00:00 |
11:56:12.78 |
+07:22:24.6 |
HIP 58372 |
30.71 |