| Parameter |
Value |
| Designation |
324P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-06-22T19:20:25.992960Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:28Z |
| Obs used |
504 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
24.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-01-23.0000000 |
| e |
0.15379944 |
| q (au) |
2.617887 |
| a (au) |
3.093696 |
| i (deg) |
21.420139 |
| Ω (om, deg) |
270.651318 |
| ω (w, deg) |
58.884181 |
| M (ma, deg) |
171.201955 |
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) |
| 2026-07-29 00:00 |
20:18:48.81 |
+01:51:21.6 |
HIP 100228 |
15.13 |
| 2026-07-29 12:00 |
20:18:21.00 |
+01:53:17.7 |
HIP 100228 |
20.62 |
| 2026-07-30 00:00 |
20:17:53.21 |
+01:55:10.8 |
HIP 100159 |
25.27 |
| 2026-07-30 12:00 |
20:17:25.46 |
+01:57:00.9 |
HIP 99890 |
23.24 |
| 2026-07-31 00:00 |
20:16:57.76 |
+01:58:48.2 |
HIP 99890 |
16.25 |
| 2026-07-31 12:00 |
20:16:30.11 |
+02:00:32.4 |
HIP 99890 |
9.55 |
| 2026-08-01 00:00 |
20:16:02.52 |
+02:02:13.8 |
HIP 99890 |
4.48 |
| 2026-08-01 12:00 |
20:15:35.00 |
+02:03:52.2 |
HIP 99872 |
3.49 |
| 2026-08-02 00:00 |
20:15:07.55 |
+02:05:27.7 |
HIP 99872 |
10.02 |
| 2026-08-02 12:00 |
20:14:40.19 |
+02:07:00.3 |
HIP 99872 |
16.93 |
| 2026-08-03 00:00 |
20:14:12.91 |
+02:08:29.9 |
HIP 99872 |
23.86 |
| 2026-08-03 12:00 |
20:13:45.73 |
+02:09:56.7 |
HIP 99552 |
25.09 |
| 2026-08-04 00:00 |
20:13:18.65 |
+02:11:20.5 |
HIP 99552 |
18.28 |
| 2026-08-04 12:00 |
20:12:51.69 |
+02:12:41.5 |
HIP 99552 |
11.63 |
| 2026-08-05 00:00 |
20:12:24.84 |
+02:13:59.6 |
HIP 99552 |
5.59 |
| 2026-08-05 12:00 |
20:11:58.12 |
+02:15:14.8 |
HIP 99552 |
4.57 |
| 2026-08-06 00:00 |
20:11:31.54 |
+02:16:27.1 |
HIP 99552 |
10.11 |
| 2026-08-06 12:00 |
20:11:05.09 |
+02:17:36.6 |
HIP 99552 |
16.54 |
| 2026-08-07 00:00 |
20:10:38.79 |
+02:18:43.3 |
HIP 99552 |
23.09 |
| 2026-08-07 12:00 |
20:10:12.64 |
+02:19:47.2 |
HIP 99552 |
29.65 |
| 2026-08-08 00:00 |
20:09:46.66 |
+02:20:48.2 |
HIP 99149 |
31.21 |
| 2026-08-08 12:00 |
20:09:20.85 |
+02:21:46.5 |
HIP 99149 |
24.69 |
| 2026-08-09 00:00 |
20:08:55.21 |
+02:22:42.0 |
HIP 99149 |
18.24 |
| 2026-08-09 12:00 |
20:08:29.76 |
+02:23:34.7 |
HIP 99149 |
11.85 |
| 2026-08-10 00:00 |
20:08:04.50 |
+02:24:24.7 |
HIP 99149 |
5.59 |
| 2026-08-10 12:00 |
20:07:39.44 |
+02:25:12.1 |
HIP 99149 |
1.77 |
| 2026-08-11 00:00 |
20:07:14.58 |
+02:25:56.7 |
HIP 99149 |
7.35 |
| 2026-08-11 12:00 |
20:06:49.94 |
+02:26:38.7 |
HIP 99149 |
13.47 |
| 2026-08-12 00:00 |
20:06:25.51 |
+02:27:18.0 |
HIP 99149 |
19.59 |
| 2026-08-12 12:00 |
20:06:01.31 |
+02:27:54.7 |
HIP 98893 |
16.65 |
| 2026-08-13 00:00 |
20:05:37.34 |
+02:28:28.9 |
HIP 98893 |
10.78 |
| 2026-08-13 12:00 |
20:05:13.62 |
+02:29:00.5 |
HIP 98893 |
5.30 |
| 2026-08-14 00:00 |
20:04:50.14 |
+02:29:29.6 |
HIP 98893 |
3.21 |
| 2026-08-14 12:00 |
20:04:26.91 |
+02:29:56.2 |
HIP 98893 |
7.78 |
| 2026-08-15 00:00 |
20:04:03.94 |
+02:30:20.4 |
HIP 98893 |
13.29 |
| 2026-08-15 12:00 |
20:03:41.23 |
+02:30:42.1 |
HIP 98893 |
18.87 |
| 2026-08-16 00:00 |
20:03:18.79 |
+02:31:01.4 |
HIP 98893 |
24.42 |
| 2026-08-16 12:00 |
20:02:56.63 |
+02:31:18.4 |
HIP 98893 |
29.92 |
| 2026-08-17 00:00 |
20:02:34.75 |
+02:31:33.1 |
HIP 98683 |
33.10 |
| 2026-08-17 12:00 |
20:02:13.16 |
+02:31:45.4 |
HIP 98683 |
33.81 |
| 2026-08-18 00:00 |
20:01:51.85 |
+02:31:55.5 |
HIP 98683 |
35.28 |
| 2026-08-18 12:00 |
20:01:30.85 |
+02:32:03.4 |
HIP 98683 |
37.39 |
| 2026-08-19 00:00 |
20:01:10.15 |
+02:32:09.0 |
HIP 98683 |
40.00 |