| 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) |
| 2026-05-12 00:00 |
12:34:55.42 |
-16:58:26.9 |
HIP 61463 |
14.40 |
| 2026-05-12 12:00 |
12:34:51.90 |
-16:57:59.8 |
HIP 61463 |
14.81 |
| 2026-05-13 00:00 |
12:34:48.40 |
-16:57:32.7 |
HIP 61325 |
14.62 |
| 2026-05-13 12:00 |
12:34:44.93 |
-16:57:05.7 |
HIP 61325 |
14.14 |
| 2026-05-14 00:00 |
12:34:41.49 |
-16:56:38.8 |
HIP 61325 |
13.71 |
| 2026-05-14 12:00 |
12:34:38.08 |
-16:56:11.9 |
HIP 61325 |
13.34 |
| 2026-05-15 00:00 |
12:34:34.69 |
-16:55:45.1 |
HIP 61325 |
13.03 |
| 2026-05-15 12:00 |
12:34:31.34 |
-16:55:18.4 |
HIP 61325 |
12.78 |
| 2026-05-16 00:00 |
12:34:28.01 |
-16:54:51.7 |
HIP 61325 |
12.60 |
| 2026-05-16 12:00 |
12:34:24.71 |
-16:54:25.2 |
HIP 61325 |
12.48 |
| 2026-05-17 00:00 |
12:34:21.43 |
-16:53:58.7 |
HIP 61325 |
12.43 |
| 2026-05-17 12:00 |
12:34:18.19 |
-16:53:32.2 |
HIP 61325 |
12.45 |
| 2026-05-18 00:00 |
12:34:14.98 |
-16:53:05.9 |
HIP 61325 |
12.53 |
| 2026-05-18 12:00 |
12:34:11.79 |
-16:52:39.7 |
HIP 61325 |
12.68 |
| 2026-05-19 00:00 |
12:34:08.64 |
-16:52:13.5 |
HIP 61325 |
12.88 |
| 2026-05-19 12:00 |
12:34:05.51 |
-16:51:47.4 |
HIP 61325 |
13.14 |
| 2026-05-20 00:00 |
12:34:02.42 |
-16:51:21.4 |
HIP 61325 |
13.45 |
| 2026-05-20 12:00 |
12:33:59.35 |
-16:50:55.6 |
HIP 61325 |
13.81 |
| 2026-05-21 00:00 |
12:33:56.32 |
-16:50:29.8 |
HIP 61325 |
14.20 |
| 2026-05-21 12:00 |
12:33:53.31 |
-16:50:04.1 |
HIP 61325 |
14.63 |
| 2026-05-22 00:00 |
12:33:50.34 |
-16:49:38.5 |
HIP 61325 |
15.09 |
| 2026-05-22 12:00 |
12:33:47.40 |
-16:49:13.0 |
HIP 61325 |
15.58 |
| 2026-05-23 00:00 |
12:33:44.49 |
-16:48:47.6 |
HIP 61236 |
15.17 |
| 2026-05-23 12:00 |
12:33:41.61 |
-16:48:22.4 |
HIP 61236 |
14.37 |
| 2026-05-24 00:00 |
12:33:38.76 |
-16:47:57.2 |
HIP 61236 |
13.57 |
| 2026-05-24 12:00 |
12:33:35.94 |
-16:47:32.2 |
HIP 61236 |
12.78 |
| 2026-05-25 00:00 |
12:33:33.16 |
-16:47:07.2 |
HIP 61236 |
12.00 |
| 2026-05-25 12:00 |
12:33:30.40 |
-16:46:42.4 |
HIP 61236 |
11.23 |
| 2026-05-26 00:00 |
12:33:27.68 |
-16:46:17.7 |
HIP 61236 |
10.46 |
| 2026-05-26 12:00 |
12:33:24.99 |
-16:45:53.1 |
HIP 61236 |
9.71 |
| 2026-05-27 00:00 |
12:33:22.33 |
-16:45:28.7 |
HIP 61236 |
8.96 |
| 2026-05-27 12:00 |
12:33:19.71 |
-16:45:04.3 |
HIP 61236 |
8.22 |
| 2026-05-28 00:00 |
12:33:17.11 |
-16:44:40.1 |
HIP 61236 |
7.49 |
| 2026-05-28 12:00 |
12:33:14.55 |
-16:44:16.0 |
HIP 61236 |
6.77 |
| 2026-05-29 00:00 |
12:33:12.02 |
-16:43:52.1 |
HIP 61236 |
6.05 |
| 2026-05-29 12:00 |
12:33:09.53 |
-16:43:28.2 |
HIP 61236 |
5.35 |
| 2026-05-30 00:00 |
12:33:07.07 |
-16:43:04.5 |
HIP 61236 |
4.66 |
| 2026-05-30 12:00 |
12:33:04.64 |
-16:42:41.0 |
HIP 61236 |
3.98 |
| 2026-05-31 00:00 |
12:33:02.24 |
-16:42:17.5 |
HIP 61236 |
3.32 |
| 2026-05-31 12:00 |
12:32:59.88 |
-16:41:54.2 |
HIP 61236 |
2.69 |
| 2026-06-01 00:00 |
12:32:57.55 |
-16:41:31.1 |
HIP 61236 |
2.09 |
| 2026-06-01 12:00 |
12:32:55.25 |
-16:41:08.1 |
HIP 61236 |
1.56 |
| 2026-06-02 00:00 |
12:32:52.99 |
-16:40:45.2 |
HIP 61236 |
1.18 |