| 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 |
-0.500 |
| 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) |
| 2026-03-26 00:00 |
07:04:06.06 |
+11:05:38.1 |
HIP 34033 |
10.95 |
| 2026-03-26 12:00 |
07:04:12.84 |
+11:06:31.5 |
HIP 34033 |
12.70 |
| 2026-03-27 00:00 |
07:04:19.84 |
+11:07:24.3 |
HIP 34033 |
14.53 |
| 2026-03-27 12:00 |
07:04:27.06 |
+11:08:16.7 |
HIP 34033 |
16.41 |
| 2026-03-28 00:00 |
07:04:34.49 |
+11:09:08.5 |
HIP 34189 |
14.82 |
| 2026-03-28 12:00 |
07:04:42.14 |
+11:09:59.9 |
HIP 34189 |
12.81 |
| 2026-03-29 00:00 |
07:04:49.99 |
+11:10:50.7 |
HIP 34189 |
10.80 |
| 2026-03-29 12:00 |
07:04:58.06 |
+11:11:40.9 |
HIP 34189 |
8.80 |
| 2026-03-30 00:00 |
07:05:06.34 |
+11:12:30.7 |
HIP 34189 |
6.86 |
| 2026-03-30 12:00 |
07:05:14.82 |
+11:13:19.9 |
HIP 34189 |
5.12 |
| 2026-03-31 00:00 |
07:05:23.51 |
+11:14:08.5 |
HIP 34189 |
3.94 |
| 2026-03-31 12:00 |
07:05:32.41 |
+11:14:56.7 |
HIP 34189 |
3.94 |
| 2026-04-01 00:00 |
07:05:41.51 |
+11:15:44.2 |
HIP 34231 |
2.82 |
| 2026-04-01 12:00 |
07:05:50.82 |
+11:16:31.2 |
HIP 34231 |
3.14 |
| 2026-04-02 00:00 |
07:06:00.33 |
+11:17:17.7 |
HIP 34231 |
4.86 |
| 2026-04-02 12:00 |
07:06:10.03 |
+11:18:03.6 |
HIP 34231 |
7.06 |
| 2026-04-03 00:00 |
07:06:19.94 |
+11:18:48.9 |
HIP 34231 |
9.45 |
| 2026-04-03 12:00 |
07:06:30.04 |
+11:19:33.7 |
HIP 34231 |
11.94 |
| 2026-04-04 00:00 |
07:06:40.35 |
+11:20:17.9 |
HIP 34231 |
14.50 |
| 2026-04-04 12:00 |
07:06:50.85 |
+11:21:01.6 |
HIP 34231 |
17.12 |
| 2026-04-05 00:00 |
07:07:01.54 |
+11:21:44.6 |
HIP 34231 |
19.79 |
| 2026-04-05 12:00 |
07:07:12.43 |
+11:22:27.1 |
HIP 34231 |
22.52 |
| 2026-04-06 00:00 |
07:07:23.51 |
+11:23:09.0 |
HIP 34231 |
25.29 |
| 2026-04-06 12:00 |
07:07:34.78 |
+11:23:50.3 |
HIP 34231 |
28.11 |
| 2026-04-07 00:00 |
07:07:46.24 |
+11:24:31.0 |
HIP 34450 |
30.93 |
| 2026-04-07 12:00 |
07:07:57.89 |
+11:25:11.1 |
HIP 34450 |
30.70 |
| 2026-04-08 00:00 |
07:08:09.73 |
+11:25:50.7 |
HIP 34450 |
30.73 |
| 2026-04-08 12:00 |
07:08:21.75 |
+11:26:29.6 |
HIP 34450 |
31.04 |
| 2026-04-09 00:00 |
07:08:33.96 |
+11:27:07.9 |
HIP 34549 |
31.43 |
| 2026-04-09 12:00 |
07:08:46.36 |
+11:27:45.6 |
HIP 34549 |
29.69 |
| 2026-04-10 00:00 |
07:08:58.94 |
+11:28:22.7 |
HIP 34549 |
28.18 |
| 2026-04-10 12:00 |
07:09:11.70 |
+11:28:59.2 |
HIP 34549 |
26.96 |
| 2026-04-11 00:00 |
07:09:24.64 |
+11:29:35.1 |
HIP 34549 |
26.09 |
| 2026-04-11 12:00 |
07:09:37.76 |
+11:30:10.3 |
HIP 34549 |
25.60 |
| 2026-04-12 00:00 |
07:09:51.07 |
+11:30:44.9 |
HIP 34549 |
25.55 |
| 2026-04-12 12:00 |
07:10:04.54 |
+11:31:18.9 |
HIP 34549 |
25.95 |
| 2026-04-13 00:00 |
07:10:18.20 |
+11:31:52.2 |
HIP 34549 |
26.79 |
| 2026-04-13 12:00 |
07:10:32.03 |
+11:32:25.0 |
HIP 34549 |
28.05 |
| 2026-04-14 00:00 |
07:10:46.04 |
+11:32:57.0 |
HIP 34549 |
29.69 |
| 2026-04-14 12:00 |
07:11:00.22 |
+11:33:28.5 |
HIP 34549 |
31.67 |
| 2026-04-15 00:00 |
07:11:14.57 |
+11:33:59.2 |
HIP 34549 |
33.94 |
| 2026-04-15 12:00 |
07:11:29.09 |
+11:34:29.4 |
HIP 34549 |
36.45 |
| 2026-04-16 00:00 |
07:11:43.78 |
+11:34:58.9 |
HIP 34960 |
37.69 |