| Parameter |
Value |
| Designation |
C/2011 J3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-01-24T09:18:41.359680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:49Z |
| Obs used |
83 |
| NEO |
- |
| M1 |
16.200 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-05-30.0000000 |
| e |
0.92583194 |
| q (au) |
1.450992 |
| a (au) |
19.563572 |
| i (deg) |
114.712382 |
| Ω (om, deg) |
21.512284 |
| ω (w, deg) |
27.844964 |
| M (ma, deg) |
1.430748 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.765 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.765 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-25 00:00 |
12:38:13.68 |
-16:45:59.9 |
HIP 61567 |
18.77 |
| 2026-09-25 12:00 |
12:38:17.51 |
-16:46:24.8 |
HIP 61567 |
19.70 |
| 2026-09-26 00:00 |
12:38:21.35 |
-16:46:49.9 |
HIP 61567 |
20.65 |
| 2026-09-26 12:00 |
12:38:25.19 |
-16:47:15.2 |
HIP 61567 |
21.60 |
| 2026-09-27 00:00 |
12:38:29.04 |
-16:47:40.5 |
HIP 61567 |
22.55 |
| 2026-09-27 12:00 |
12:38:32.88 |
-16:48:06.1 |
HIP 61567 |
23.52 |
| 2026-09-28 00:00 |
12:38:36.74 |
-16:48:31.7 |
HIP 61567 |
24.48 |
| 2026-09-28 12:00 |
12:38:40.59 |
-16:48:57.5 |
HIP 61567 |
25.45 |
| 2026-09-29 00:00 |
12:38:44.45 |
-16:49:23.4 |
HIP 61567 |
26.43 |
| 2026-09-29 12:00 |
12:38:48.31 |
-16:49:49.4 |
HIP 61567 |
27.41 |
| 2026-09-30 00:00 |
12:38:52.18 |
-16:50:15.6 |
HIP 61567 |
28.40 |
| 2026-09-30 12:00 |
12:38:56.04 |
-16:50:41.8 |
HIP 61567 |
29.38 |
| 2026-10-01 00:00 |
12:38:59.91 |
-16:51:08.3 |
HIP 61567 |
30.38 |
| 2026-10-01 12:00 |
12:39:03.78 |
-16:51:34.8 |
HIP 61567 |
31.37 |
| 2026-10-02 00:00 |
12:39:07.65 |
-16:52:01.4 |
HIP 61567 |
32.37 |
| 2026-10-02 12:00 |
12:39:11.52 |
-16:52:28.2 |
HIP 61567 |
33.37 |
| 2026-10-03 00:00 |
12:39:15.40 |
-16:52:55.1 |
HIP 61567 |
34.37 |
| 2026-10-03 12:00 |
12:39:19.27 |
-16:53:22.1 |
HIP 61567 |
35.37 |
| 2026-10-04 00:00 |
12:39:23.14 |
-16:53:49.2 |
HIP 61567 |
36.38 |
| 2026-10-04 12:00 |
12:39:27.02 |
-16:54:16.5 |
HIP 61567 |
37.38 |
| 2026-10-05 00:00 |
12:39:30.89 |
-16:54:43.8 |
HIP 61567 |
38.39 |
| 2026-10-05 12:00 |
12:39:34.77 |
-16:55:11.3 |
HIP 61567 |
39.40 |
| 2026-10-06 00:00 |
12:39:38.64 |
-16:55:38.9 |
HIP 61567 |
40.42 |
| 2026-10-06 12:00 |
12:39:42.51 |
-16:56:06.6 |
HIP 61567 |
41.43 |
| 2026-10-07 00:00 |
12:39:46.38 |
-16:56:34.3 |
HIP 61567 |
42.44 |
| 2026-10-07 12:00 |
12:39:50.25 |
-16:57:02.2 |
HIP 61567 |
43.46 |
| 2026-10-08 00:00 |
12:39:54.12 |
-16:57:30.2 |
HIP 61804 |
43.58 |
| 2026-10-08 12:00 |
12:39:57.99 |
-16:57:58.3 |
HIP 61804 |
43.09 |
| 2026-10-09 00:00 |
12:40:01.85 |
-16:58:26.5 |
HIP 61804 |
42.62 |
| 2026-10-09 12:00 |
12:40:05.71 |
-16:58:54.8 |
HIP 61804 |
42.17 |
| 2026-10-10 00:00 |
12:40:09.57 |
-16:59:23.2 |
HIP 61804 |
41.73 |
| 2026-10-10 12:00 |
12:40:13.43 |
-16:59:51.7 |
HIP 61804 |
41.32 |
| 2026-10-11 00:00 |
12:40:17.28 |
-17:00:20.3 |
HIP 61804 |
40.93 |
| 2026-10-11 12:00 |
12:40:21.12 |
-17:00:48.9 |
HIP 61804 |
40.56 |
| 2026-10-12 00:00 |
12:40:24.97 |
-17:01:17.7 |
HIP 61804 |
40.20 |
| 2026-10-12 12:00 |
12:40:28.81 |
-17:01:46.5 |
HIP 61804 |
39.88 |
| 2026-10-13 00:00 |
12:40:32.64 |
-17:02:15.5 |
HIP 61804 |
39.57 |
| 2026-10-13 12:00 |
12:40:36.47 |
-17:02:44.5 |
HIP 61804 |
39.29 |
| 2026-10-14 00:00 |
12:40:40.29 |
-17:03:13.6 |
HIP 61804 |
39.03 |
| 2026-10-14 12:00 |
12:40:44.11 |
-17:03:42.7 |
HIP 61804 |
38.79 |
| 2026-10-15 00:00 |
12:40:47.92 |
-17:04:12.0 |
HIP 61804 |
38.58 |
| 2026-10-15 12:00 |
12:40:51.73 |
-17:04:41.3 |
HIP 61804 |
38.40 |
| 2026-10-16 00:00 |
12:40:55.53 |
-17:05:10.7 |
HIP 61804 |
38.24 |