| 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
$$
M_a = (16.306 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.306 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.506 |
| k |
1.000 |
| δ90 |
2.437 |
| 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 |
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 |
| 2026-06-02 12:00 |
20:49:42.22 |
-05:55:45.9 |
HIP 102655 |
23.42 |
| 2026-06-03 00:00 |
20:49:44.34 |
-05:50:21.8 |
HIP 102655 |
25.74 |
| 2026-06-03 12:00 |
20:49:46.10 |
-05:44:58.1 |
HIP 102945 |
25.85 |
| 2026-06-04 00:00 |
20:49:47.50 |
-05:39:34.8 |
HIP 102945 |
24.51 |
| 2026-06-04 12:00 |
20:49:48.53 |
-05:34:11.9 |
HIP 102945 |
24.41 |
| 2026-06-05 00:00 |
20:49:49.19 |
-05:28:49.5 |
HIP 102829 |
20.11 |
| 2026-06-05 12:00 |
20:49:49.48 |
-05:23:27.6 |
HIP 102829 |
14.76 |
| 2026-06-06 00:00 |
20:49:49.41 |
-05:18:06.2 |
HIP 102829 |
9.47 |
| 2026-06-06 12:00 |
20:49:48.97 |
-05:12:45.4 |
HIP 102829 |
4.37 |
| 2026-06-07 00:00 |
20:49:48.16 |
-05:07:25.1 |
HIP 102829 |
2.48 |
| 2026-06-07 12:00 |
20:49:46.97 |
-05:02:05.4 |
HIP 102829 |
7.11 |
| 2026-06-08 00:00 |
20:49:45.41 |
-04:56:46.3 |
HIP 102829 |
12.33 |
| 2026-06-08 12:00 |
20:49:43.48 |
-04:51:27.8 |
HIP 102894 |
15.16 |
| 2026-06-09 00:00 |
20:49:41.18 |
-04:46:10.0 |
HIP 102894 |
15.25 |
| 2026-06-09 12:00 |
20:49:38.50 |
-04:40:52.8 |
HIP 102894 |
17.18 |
| 2026-06-10 00:00 |
20:49:35.44 |
-04:35:36.4 |
HIP 102666 |
20.10 |
| 2026-06-10 12:00 |
20:49:32.01 |
-04:30:20.7 |
HIP 102666 |
20.69 |
| 2026-06-11 00:00 |
20:49:28.20 |
-04:25:05.7 |
HIP 102666 |
22.47 |
| 2026-06-11 12:00 |
20:49:24.01 |
-04:19:51.5 |
HIP 102666 |
25.20 |
| 2026-06-12 00:00 |
20:49:19.45 |
-04:14:38.1 |
HIP 102802 |
21.76 |
| 2026-06-12 12:00 |
20:49:14.51 |
-04:09:25.6 |
HIP 102802 |
17.06 |
| 2026-06-13 00:00 |
20:49:09.19 |
-04:04:13.9 |
HIP 102802 |
12.94 |
| 2026-06-13 12:00 |
20:49:03.49 |
-03:59:03.1 |
HIP 102802 |
10.16 |
| 2026-06-14 00:00 |
20:48:57.42 |
-03:53:53.2 |
HIP 102802 |
9.92 |
| 2026-06-14 12:00 |
20:48:50.96 |
-03:48:44.3 |
HIP 102679 |
11.20 |
| 2026-06-15 00:00 |
20:48:44.13 |
-03:43:36.3 |
HIP 102679 |
6.31 |
| 2026-06-15 12:00 |
20:48:36.92 |
-03:38:29.3 |
HIP 102679 |
3.47 |
| 2026-06-16 00:00 |
20:48:29.34 |
-03:33:23.3 |
HIP 102679 |
6.53 |
| 2026-06-16 12:00 |
20:48:21.38 |
-03:28:18.4 |
HIP 102679 |
11.49 |
| 2026-06-17 00:00 |
20:48:13.05 |
-03:23:14.6 |
HIP 102679 |
16.76 |
| 2026-06-17 12:00 |
20:48:04.35 |
-03:18:11.8 |
HIP 102679 |
22.13 |
| 2026-06-18 00:00 |
20:47:55.27 |
-03:13:10.2 |
HIP 102679 |
27.56 |
| 2026-06-18 12:00 |
20:47:45.82 |
-03:08:09.7 |
HIP 102547 |
28.83 |
| 2026-06-19 00:00 |
20:47:36.00 |
-03:03:10.4 |
HIP 102547 |
23.28 |
| 2026-06-19 12:00 |
20:47:25.81 |
-02:58:12.3 |
HIP 102547 |
17.71 |
| 2026-06-20 00:00 |
20:47:15.25 |
-02:53:15.4 |
HIP 102547 |
12.11 |
| 2026-06-20 12:00 |
20:47:04.33 |
-02:48:19.8 |
HIP 102547 |
6.48 |
| 2026-06-21 00:00 |
20:46:53.05 |
-02:43:25.4 |
HIP 102547 |
0.88 |
| 2026-06-21 12:00 |
20:46:41.40 |
-02:38:32.4 |
HIP 102547 |
4.88 |
| 2026-06-22 00:00 |
20:46:29.39 |
-02:33:40.7 |
HIP 102561 |
9.64 |