| Parameter |
Value |
| Designation |
324P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-06-22T21:26:10.155840Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:19Z |
| Obs used |
500 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
25.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-12-12.0000000 |
| e |
0.15378585 |
| q (au) |
2.617981 |
| a (au) |
3.093757 |
| i (deg) |
21.420027 |
| Ω (om, deg) |
270.651010 |
| ω (w, deg) |
58.900249 |
| M (ma, deg) |
163.573823 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.308 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.308 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.501 |
| k |
1.000 |
| δ90 |
2.417 |
| 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) |
| 2026-05-12 00:00 |
20:42:45.57 |
-09:50:33.1 |
HIP 102072 |
26.96 |
| 2026-05-12 12:00 |
20:43:02.08 |
-09:45:06.4 |
HIP 102072 |
29.00 |
| 2026-05-13 00:00 |
20:43:18.28 |
-09:39:39.4 |
HIP 102072 |
32.28 |
| 2026-05-13 12:00 |
20:43:34.18 |
-09:34:12.3 |
HIP 102351 |
32.91 |
| 2026-05-14 00:00 |
20:43:49.77 |
-09:28:45.0 |
HIP 102351 |
26.59 |
| 2026-05-14 12:00 |
20:44:05.05 |
-09:23:17.4 |
HIP 102351 |
20.50 |
| 2026-05-15 00:00 |
20:44:20.03 |
-09:17:49.8 |
HIP 102351 |
14.88 |
| 2026-05-15 12:00 |
20:44:34.68 |
-09:12:21.9 |
HIP 102351 |
10.42 |
| 2026-05-16 00:00 |
20:44:49.03 |
-09:06:53.9 |
HIP 102351 |
8.97 |
| 2026-05-16 12:00 |
20:45:03.06 |
-09:01:25.8 |
HIP 102351 |
11.64 |
| 2026-05-17 00:00 |
20:45:16.77 |
-08:55:57.6 |
HIP 102351 |
16.49 |
| 2026-05-17 12:00 |
20:45:30.16 |
-08:50:29.2 |
HIP 102351 |
22.10 |
| 2026-05-18 00:00 |
20:45:43.23 |
-08:45:00.8 |
HIP 102475 |
17.96 |
| 2026-05-18 12:00 |
20:45:55.98 |
-08:39:32.3 |
HIP 102475 |
12.16 |
| 2026-05-19 00:00 |
20:46:08.41 |
-08:34:03.7 |
HIP 102475 |
7.22 |
| 2026-05-19 12:00 |
20:46:20.51 |
-08:28:35.1 |
HIP 102475 |
5.87 |
| 2026-05-20 00:00 |
20:46:32.28 |
-08:23:06.4 |
HIP 102475 |
9.66 |
| 2026-05-20 12:00 |
20:46:43.73 |
-08:17:37.7 |
HIP 102475 |
15.08 |
| 2026-05-21 00:00 |
20:46:54.84 |
-08:12:09.0 |
HIP 102475 |
20.86 |
| 2026-05-21 12:00 |
20:47:05.63 |
-08:06:40.3 |
HIP 102475 |
26.74 |
| 2026-05-22 00:00 |
20:47:16.09 |
-08:01:11.6 |
HIP 102436 |
32.58 |
| 2026-05-22 12:00 |
20:47:26.21 |
-07:55:42.9 |
HIP 102436 |
32.40 |
| 2026-05-23 00:00 |
20:47:36.00 |
-07:50:14.3 |
HIP 102436 |
33.24 |
| 2026-05-23 12:00 |
20:47:45.46 |
-07:44:45.7 |
HIP 102436 |
35.02 |
| 2026-05-24 00:00 |
20:47:54.57 |
-07:39:17.2 |
HIP 102614 |
32.83 |
| 2026-05-24 12:00 |
20:48:03.35 |
-07:33:48.7 |
HIP 102614 |
27.78 |
| 2026-05-25 00:00 |
20:48:11.80 |
-07:28:20.3 |
HIP 102614 |
23.10 |
| 2026-05-25 12:00 |
20:48:19.90 |
-07:22:52.1 |
HIP 102614 |
19.04 |
| 2026-05-26 00:00 |
20:48:27.66 |
-07:17:23.9 |
HIP 102614 |
16.04 |
| 2026-05-26 12:00 |
20:48:35.08 |
-07:11:55.9 |
HIP 102614 |
14.74 |
| 2026-05-27 00:00 |
20:48:42.15 |
-07:06:28.0 |
HIP 102614 |
15.52 |
| 2026-05-27 12:00 |
20:48:48.88 |
-07:01:00.3 |
HIP 102614 |
18.10 |
| 2026-05-28 00:00 |
20:48:55.26 |
-06:55:32.7 |
HIP 102820 |
19.10 |
| 2026-05-28 12:00 |
20:49:01.29 |
-06:50:05.4 |
HIP 102820 |
14.40 |
| 2026-05-29 00:00 |
20:49:06.98 |
-06:44:38.2 |
HIP 102820 |
10.75 |
| 2026-05-29 12:00 |
20:49:12.31 |
-06:39:11.3 |
HIP 102820 |
9.43 |
| 2026-05-30 00:00 |
20:49:17.30 |
-06:33:44.6 |
HIP 102820 |
11.24 |
| 2026-05-30 12:00 |
20:49:21.93 |
-06:28:18.1 |
HIP 102820 |
15.07 |
| 2026-05-31 00:00 |
20:49:26.20 |
-06:22:52.0 |
HIP 102820 |
19.76 |
| 2026-05-31 12:00 |
20:49:30.12 |
-06:17:26.1 |
HIP 102820 |
24.82 |
| 2026-06-01 00:00 |
20:49:33.68 |
-06:12:00.6 |
HIP 102655 |
23.20 |
| 2026-06-01 12:00 |
20:49:36.89 |
-06:06:35.3 |
HIP 102655 |
22.04 |
| 2026-06-02 00:00 |
20:49:39.73 |
-06:01:10.4 |
HIP 102655 |
22.12 |