| Parameter |
Value |
| Designation |
419P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-03-15T12:20:00.761280Z |
| Orbit solution date (soln_date, UTC) |
2023-10-29T03:13:38Z |
| Obs used |
297 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
23.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-06-11.0000000 |
| e |
0.27849867 |
| q (au) |
2.542241 |
| a (au) |
3.523542 |
| i (deg) |
2.804422 |
| Ω (om, deg) |
40.425087 |
| ω (w, deg) |
187.263454 |
| M (ma, deg) |
121.968066 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.031 + 2.720\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.031 |
| n |
2.720 |
| gf |
0.999 |
| gb |
-0.904 |
| k |
0.999 |
| 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 |
04:43:19.09 |
+24:08:04.7 |
HIP 21961 |
3.00 |
| 2026-03-26 12:00 |
04:43:41.38 |
+24:08:39.9 |
HIP 21961 |
7.13 |
| 2026-03-27 00:00 |
04:44:03.84 |
+24:09:15.2 |
HIP 21961 |
12.08 |
| 2026-03-27 12:00 |
04:44:26.46 |
+24:09:50.6 |
HIP 21961 |
17.19 |
| 2026-03-28 00:00 |
04:44:49.23 |
+24:10:26.1 |
HIP 22096 |
15.64 |
| 2026-03-28 12:00 |
04:45:12.17 |
+24:11:01.8 |
HIP 22096 |
13.65 |
| 2026-03-29 00:00 |
04:45:35.27 |
+24:11:37.6 |
HIP 22096 |
13.55 |
| 2026-03-29 12:00 |
04:45:58.53 |
+24:12:13.5 |
HIP 22096 |
15.42 |
| 2026-03-30 00:00 |
04:46:21.94 |
+24:12:49.5 |
HIP 22096 |
18.70 |
| 2026-03-30 12:00 |
04:46:45.51 |
+24:13:25.6 |
HIP 22096 |
22.81 |
| 2026-03-31 00:00 |
04:47:09.23 |
+24:14:01.8 |
HIP 22096 |
27.41 |
| 2026-03-31 12:00 |
04:47:33.11 |
+24:14:38.1 |
HIP 22306 |
30.41 |
| 2026-04-01 00:00 |
04:47:57.14 |
+24:15:14.4 |
HIP 22306 |
29.72 |
| 2026-04-01 12:00 |
04:48:21.32 |
+24:15:50.9 |
HIP 22334 |
28.93 |
| 2026-04-02 00:00 |
04:48:45.65 |
+24:16:27.4 |
HIP 22334 |
28.23 |
| 2026-04-02 12:00 |
04:49:10.13 |
+24:17:04.0 |
HIP 22536 |
27.00 |
| 2026-04-03 00:00 |
04:49:34.75 |
+24:17:40.6 |
HIP 22536 |
22.13 |
| 2026-04-03 12:00 |
04:49:59.53 |
+24:18:17.3 |
HIP 22557 |
17.18 |
| 2026-04-04 00:00 |
04:50:24.45 |
+24:18:54.0 |
HIP 22557 |
11.57 |
| 2026-04-04 12:00 |
04:50:49.51 |
+24:19:30.7 |
HIP 22557 |
6.12 |
| 2026-04-05 00:00 |
04:51:14.72 |
+24:20:07.5 |
HIP 22557 |
2.68 |
| 2026-04-05 12:00 |
04:51:40.08 |
+24:20:44.4 |
HIP 22557 |
6.63 |
| 2026-04-06 00:00 |
04:52:05.57 |
+24:21:21.2 |
HIP 22557 |
12.20 |
| 2026-04-06 12:00 |
04:52:31.21 |
+24:21:58.1 |
HIP 22729 |
16.20 |
| 2026-04-07 00:00 |
04:52:56.99 |
+24:22:34.9 |
HIP 22729 |
13.23 |
| 2026-04-07 12:00 |
04:53:22.91 |
+24:23:11.8 |
HIP 22729 |
12.55 |
| 2026-04-08 00:00 |
04:53:48.96 |
+24:23:48.7 |
HIP 22729 |
14.53 |
| 2026-04-08 12:00 |
04:54:15.15 |
+24:24:25.6 |
HIP 22729 |
18.34 |
| 2026-04-09 00:00 |
04:54:41.48 |
+24:25:02.4 |
HIP 22829 |
19.28 |
| 2026-04-09 12:00 |
04:55:07.95 |
+24:25:39.3 |
HIP 22949 |
18.29 |
| 2026-04-10 00:00 |
04:55:34.55 |
+24:26:16.1 |
HIP 22949 |
13.15 |
| 2026-04-10 12:00 |
04:56:01.28 |
+24:26:52.9 |
HIP 22949 |
9.25 |
| 2026-04-11 00:00 |
04:56:28.15 |
+24:27:29.7 |
HIP 22949 |
8.53 |
| 2026-04-11 12:00 |
04:56:55.15 |
+24:28:06.4 |
HIP 22949 |
11.67 |
| 2026-04-12 00:00 |
04:57:22.28 |
+24:28:43.1 |
HIP 22949 |
16.63 |
| 2026-04-12 12:00 |
04:57:49.54 |
+24:29:19.7 |
HIP 23151 |
14.39 |
| 2026-04-13 00:00 |
04:58:16.93 |
+24:29:56.3 |
HIP 23151 |
8.15 |
| 2026-04-13 12:00 |
04:58:44.45 |
+24:30:32.8 |
HIP 23151 |
2.05 |
| 2026-04-14 00:00 |
04:59:12.10 |
+24:31:09.2 |
HIP 23151 |
4.62 |
| 2026-04-14 12:00 |
04:59:39.87 |
+24:31:45.6 |
HIP 23151 |
10.91 |
| 2026-04-15 00:00 |
05:00:07.76 |
+24:32:21.9 |
HIP 23151 |
17.26 |
| 2026-04-15 12:00 |
05:00:35.79 |
+24:32:58.1 |
HIP 23384 |
14.97 |
| 2026-04-16 00:00 |
05:01:03.93 |
+24:33:34.2 |
HIP 23384 |
8.93 |