| Parameter |
Value |
| Designation |
219P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-02-21T05:39:11.623680Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:06Z |
| Obs used |
1145 |
| NEO |
- |
| M1 |
5.900 |
| K1 |
24.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-06-19.0000000 |
| e |
0.35196615 |
| q (au) |
2.365480 |
| a (au) |
3.650242 |
| i (deg) |
11.528879 |
| Ω (om, deg) |
231.031617 |
| ω (w, deg) |
107.482590 |
| M (ma, deg) |
221.750045 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.086 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.086 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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 |
07:43:36.67 |
+11:30:00.9 |
HIP 37755 |
29.40 |
| 2026-06-01 12:00 |
07:44:01.96 |
+11:29:24.0 |
HIP 37852 |
27.25 |
| 2026-06-02 00:00 |
07:44:27.31 |
+11:28:46.3 |
HIP 37852 |
22.81 |
| 2026-06-02 12:00 |
07:44:52.73 |
+11:28:07.8 |
HIP 37852 |
19.38 |
| 2026-06-03 00:00 |
07:45:18.21 |
+11:27:28.7 |
HIP 37852 |
17.59 |
| 2026-06-03 12:00 |
07:45:43.76 |
+11:26:48.9 |
HIP 37852 |
17.96 |
| 2026-06-04 00:00 |
07:46:09.36 |
+11:26:08.3 |
HIP 37852 |
20.39 |
| 2026-06-04 12:00 |
07:46:35.03 |
+11:25:27.0 |
HIP 37852 |
24.27 |
| 2026-06-05 00:00 |
07:47:00.76 |
+11:24:45.0 |
HIP 38057 |
23.24 |
| 2026-06-05 12:00 |
07:47:26.55 |
+11:24:02.2 |
HIP 38057 |
19.28 |
| 2026-06-06 00:00 |
07:47:52.40 |
+11:23:18.8 |
HIP 38057 |
16.85 |
| 2026-06-06 12:00 |
07:48:18.31 |
+11:22:34.6 |
HIP 38119 |
15.15 |
| 2026-06-07 00:00 |
07:48:44.28 |
+11:21:49.7 |
HIP 38119 |
13.26 |
| 2026-06-07 12:00 |
07:49:10.30 |
+11:21:04.1 |
HIP 38119 |
14.30 |
| 2026-06-08 00:00 |
07:49:36.38 |
+11:20:17.8 |
HIP 38119 |
17.77 |
| 2026-06-08 12:00 |
07:50:02.52 |
+11:19:30.8 |
HIP 38362 |
22.40 |
| 2026-06-09 00:00 |
07:50:28.71 |
+11:18:43.0 |
HIP 38362 |
16.38 |
| 2026-06-09 12:00 |
07:50:54.95 |
+11:17:54.6 |
HIP 38362 |
10.87 |
| 2026-06-10 00:00 |
07:51:21.25 |
+11:17:05.4 |
HIP 38362 |
7.21 |
| 2026-06-10 12:00 |
07:51:47.60 |
+11:16:15.5 |
HIP 38362 |
8.38 |
| 2026-06-11 00:00 |
07:52:14.01 |
+11:15:24.9 |
HIP 38362 |
13.18 |
| 2026-06-11 12:00 |
07:52:40.46 |
+11:14:33.5 |
HIP 38362 |
19.04 |
| 2026-06-12 00:00 |
07:53:06.97 |
+11:13:41.5 |
HIP 38362 |
25.26 |
| 2026-06-12 12:00 |
07:53:33.52 |
+11:12:48.7 |
HIP 38547 |
31.60 |
| 2026-06-13 00:00 |
07:54:00.12 |
+11:11:55.3 |
HIP 38547 |
31.21 |
| 2026-06-13 12:00 |
07:54:26.77 |
+11:11:01.1 |
HIP 38810 |
32.12 |
| 2026-06-14 00:00 |
07:54:53.47 |
+11:10:06.2 |
HIP 38810 |
25.57 |
| 2026-06-14 12:00 |
07:55:20.21 |
+11:09:10.6 |
HIP 38810 |
19.05 |
| 2026-06-15 00:00 |
07:55:47.00 |
+11:08:14.3 |
HIP 38810 |
12.61 |
| 2026-06-15 12:00 |
07:56:13.84 |
+11:07:17.3 |
HIP 38810 |
6.59 |
| 2026-06-16 00:00 |
07:56:40.71 |
+11:06:19.6 |
HIP 38810 |
4.01 |
| 2026-06-16 12:00 |
07:57:07.63 |
+11:05:21.1 |
HIP 38810 |
8.82 |
| 2026-06-17 00:00 |
07:57:34.59 |
+11:04:22.0 |
HIP 38810 |
15.13 |
| 2026-06-17 12:00 |
07:58:01.60 |
+11:03:22.2 |
HIP 38810 |
21.67 |
| 2026-06-18 00:00 |
07:58:28.64 |
+11:02:21.7 |
HIP 39040 |
26.34 |
| 2026-06-18 12:00 |
07:58:55.72 |
+11:01:20.4 |
HIP 39040 |
25.17 |
| 2026-06-19 00:00 |
07:59:22.84 |
+11:00:18.5 |
HIP 39040 |
25.77 |
| 2026-06-19 12:00 |
07:59:49.99 |
+10:59:15.9 |
HIP 39209 |
20.46 |
| 2026-06-20 00:00 |
08:00:17.19 |
+10:58:12.6 |
HIP 39209 |
13.94 |
| 2026-06-20 12:00 |
08:00:44.41 |
+10:57:08.6 |
HIP 39209 |
7.81 |
| 2026-06-21 00:00 |
08:01:11.68 |
+10:56:04.0 |
HIP 39209 |
4.42 |
| 2026-06-21 12:00 |
08:01:38.97 |
+10:54:58.6 |
HIP 39209 |
8.37 |
| 2026-06-22 00:00 |
08:02:06.30 |
+10:53:52.6 |
HIP 39359 |
11.24 |