| Parameter |
Value |
| Designation |
329P/LINEAR-Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-12-05T06:20:59.193600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:25Z |
| Obs used |
685 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
36.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-05-10.0000000 |
| e |
0.68010907 |
| q (au) |
1.660001 |
| a (au) |
5.189273 |
| i (deg) |
21.466984 |
| Ω (om, deg) |
88.791911 |
| ω (w, deg) |
342.313801 |
| M (ma, deg) |
281.687284 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.015 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.015 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.547 |
| k |
0.800 |
| δ90 |
10.000 |
| 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 |
21:44:11.19 |
-29:59:40.3 |
HIP 107130 |
34.00 |
| 2026-06-01 12:00 |
21:44:17.14 |
-30:01:52.7 |
HIP 107130 |
36.33 |
| 2026-06-02 00:00 |
21:44:22.87 |
-30:04:06.5 |
HIP 107130 |
38.66 |
| 2026-06-02 12:00 |
21:44:28.38 |
-30:06:21.8 |
HIP 107130 |
41.00 |
| 2026-06-03 00:00 |
21:44:33.66 |
-30:08:38.6 |
HIP 107133 |
42.07 |
| 2026-06-03 12:00 |
21:44:38.71 |
-30:10:56.7 |
HIP 107133 |
41.50 |
| 2026-06-04 00:00 |
21:44:43.54 |
-30:13:16.3 |
HIP 107133 |
41.02 |
| 2026-06-04 12:00 |
21:44:48.15 |
-30:15:37.4 |
HIP 107133 |
40.64 |
| 2026-06-05 00:00 |
21:44:52.52 |
-30:17:59.8 |
HIP 107133 |
40.37 |
| 2026-06-05 12:00 |
21:44:56.66 |
-30:20:23.7 |
HIP 107133 |
40.19 |
| 2026-06-06 00:00 |
21:45:00.57 |
-30:22:49.1 |
HIP 107133 |
40.13 |
| 2026-06-06 12:00 |
21:45:04.25 |
-30:25:15.8 |
HIP 107133 |
40.17 |
| 2026-06-07 00:00 |
21:45:07.69 |
-30:27:44.0 |
HIP 107133 |
40.32 |
| 2026-06-07 12:00 |
21:45:10.89 |
-30:30:13.6 |
HIP 107608 |
40.57 |
| 2026-06-08 00:00 |
21:45:13.86 |
-30:32:44.6 |
HIP 107608 |
38.61 |
| 2026-06-08 12:00 |
21:45:16.59 |
-30:35:17.1 |
HIP 107608 |
36.77 |
| 2026-06-09 00:00 |
21:45:19.08 |
-30:37:50.9 |
HIP 107608 |
35.06 |
| 2026-06-09 12:00 |
21:45:21.33 |
-30:40:26.1 |
HIP 107608 |
33.50 |
| 2026-06-10 00:00 |
21:45:23.34 |
-30:43:02.8 |
HIP 107608 |
32.13 |
| 2026-06-10 12:00 |
21:45:25.10 |
-30:45:40.8 |
HIP 107608 |
30.97 |
| 2026-06-11 00:00 |
21:45:26.61 |
-30:48:20.2 |
HIP 107608 |
30.04 |
| 2026-06-11 12:00 |
21:45:27.88 |
-30:51:01.0 |
HIP 107608 |
29.39 |
| 2026-06-12 00:00 |
21:45:28.91 |
-30:53:43.2 |
HIP 107608 |
29.02 |
| 2026-06-12 12:00 |
21:45:29.68 |
-30:56:26.8 |
HIP 107608 |
28.96 |
| 2026-06-13 00:00 |
21:45:30.20 |
-30:59:11.7 |
HIP 107608 |
29.21 |
| 2026-06-13 12:00 |
21:45:30.47 |
-31:01:57.9 |
HIP 107261 |
28.51 |
| 2026-06-14 00:00 |
21:45:30.49 |
-31:04:45.5 |
HIP 107261 |
27.35 |
| 2026-06-14 12:00 |
21:45:30.26 |
-31:07:34.4 |
HIP 107261 |
26.38 |
| 2026-06-15 00:00 |
21:45:29.77 |
-31:10:24.6 |
HIP 107261 |
25.62 |
| 2026-06-15 12:00 |
21:45:29.03 |
-31:13:16.2 |
HIP 107261 |
25.11 |
| 2026-06-16 00:00 |
21:45:28.03 |
-31:16:09.0 |
HIP 107399 |
23.23 |
| 2026-06-16 12:00 |
21:45:26.78 |
-31:19:03.1 |
HIP 107399 |
20.32 |
| 2026-06-17 00:00 |
21:45:25.27 |
-31:21:58.5 |
HIP 107399 |
17.38 |
| 2026-06-17 12:00 |
21:45:23.50 |
-31:24:55.1 |
HIP 107399 |
14.41 |
| 2026-06-18 00:00 |
21:45:21.47 |
-31:27:53.0 |
HIP 107399 |
11.42 |
| 2026-06-18 12:00 |
21:45:19.18 |
-31:30:52.1 |
HIP 107399 |
8.39 |
| 2026-06-19 00:00 |
21:45:16.63 |
-31:33:52.4 |
HIP 107399 |
5.34 |
| 2026-06-19 12:00 |
21:45:13.83 |
-31:36:53.9 |
HIP 107399 |
2.27 |
| 2026-06-20 00:00 |
21:45:10.76 |
-31:39:56.7 |
HIP 107399 |
0.96 |
| 2026-06-20 12:00 |
21:45:07.42 |
-31:43:00.5 |
HIP 107399 |
4.05 |
| 2026-06-21 00:00 |
21:45:03.83 |
-31:46:05.6 |
HIP 107399 |
7.22 |
| 2026-06-21 12:00 |
21:44:59.98 |
-31:49:11.8 |
HIP 107399 |
10.43 |
| 2026-06-22 00:00 |
21:44:55.86 |
-31:52:19.1 |
HIP 107399 |
13.67 |