| Parameter |
Value |
| Designation |
P/2019 A3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-08-01T21:04:24.133440Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:13:36Z |
| Obs used |
66 |
| NEO |
- |
| M1 |
19.100 |
| K1 |
5.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-01-03T06:27:04.320000Z |
| Discovery magnitude (MPC) |
21.90 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-01-04.0000000 |
| e |
0.26518544 |
| q (au) |
2.312949 |
| a (au) |
3.147663 |
| i (deg) |
15.365067 |
| Ω (om, deg) |
31.323079 |
| ω (w, deg) |
325.480485 |
| M (ma, deg) |
91.796650 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.507 + 5.147\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.507 |
| n |
5.147 |
| gf |
0.999 |
| gb |
-0.907 |
| k |
0.996 |
| δ90 |
1.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
09:53:38.16 |
+25:35:17.4 |
HIP 48511 |
4.77 |
| 2026-06-01 12:00 |
09:53:57.88 |
+25:31:48.4 |
HIP 48511 |
9.50 |
| 2026-06-02 00:00 |
09:54:17.75 |
+25:28:19.1 |
HIP 48511 |
14.91 |
| 2026-06-02 12:00 |
09:54:37.77 |
+25:24:49.4 |
HIP 48511 |
20.50 |
| 2026-06-03 00:00 |
09:54:57.94 |
+25:21:19.3 |
HIP 48511 |
26.17 |
| 2026-06-03 12:00 |
09:55:18.24 |
+25:17:49.0 |
HIP 48759 |
24.41 |
| 2026-06-04 00:00 |
09:55:38.69 |
+25:14:18.2 |
HIP 48759 |
18.61 |
| 2026-06-04 12:00 |
09:55:59.28 |
+25:10:47.2 |
HIP 48759 |
12.77 |
| 2026-06-05 00:00 |
09:56:20.02 |
+25:07:15.8 |
HIP 48759 |
6.91 |
| 2026-06-05 12:00 |
09:56:40.89 |
+25:03:44.1 |
HIP 48759 |
1.02 |
| 2026-06-06 00:00 |
09:57:01.89 |
+25:00:12.1 |
HIP 48759 |
4.92 |
| 2026-06-06 12:00 |
09:57:23.04 |
+24:56:39.7 |
HIP 48810 |
8.97 |
| 2026-06-07 00:00 |
09:57:44.32 |
+24:53:07.0 |
HIP 48810 |
7.67 |
| 2026-06-07 12:00 |
09:58:05.73 |
+24:49:34.0 |
HIP 48810 |
10.47 |
| 2026-06-08 00:00 |
09:58:27.27 |
+24:46:00.7 |
HIP 48810 |
15.29 |
| 2026-06-08 12:00 |
09:58:48.95 |
+24:42:27.0 |
HIP 49018 |
18.99 |
| 2026-06-09 00:00 |
09:59:10.76 |
+24:38:53.1 |
HIP 49018 |
12.94 |
| 2026-06-09 12:00 |
09:59:32.70 |
+24:35:18.8 |
HIP 49018 |
6.97 |
| 2026-06-10 00:00 |
09:59:54.76 |
+24:31:44.2 |
HIP 49018 |
2.16 |
| 2026-06-10 12:00 |
10:00:16.95 |
+24:28:09.4 |
HIP 49018 |
6.08 |
| 2026-06-11 00:00 |
10:00:39.27 |
+24:24:34.2 |
HIP 49018 |
12.10 |
| 2026-06-11 12:00 |
10:01:01.71 |
+24:20:58.7 |
HIP 49018 |
18.28 |
| 2026-06-12 00:00 |
10:01:24.28 |
+24:17:22.9 |
HIP 49153 |
19.64 |
| 2026-06-12 12:00 |
10:01:46.96 |
+24:13:46.8 |
HIP 49153 |
14.97 |
| 2026-06-13 00:00 |
10:02:09.77 |
+24:10:10.4 |
HIP 49153 |
11.93 |
| 2026-06-13 12:00 |
10:02:32.70 |
+24:06:33.8 |
HIP 49153 |
11.88 |
| 2026-06-14 00:00 |
10:02:55.75 |
+24:02:56.8 |
HIP 49153 |
14.89 |
| 2026-06-14 12:00 |
10:03:18.92 |
+23:59:19.6 |
HIP 49153 |
19.62 |
| 2026-06-15 00:00 |
10:03:42.20 |
+23:55:42.0 |
HIP 49153 |
25.14 |
| 2026-06-15 12:00 |
10:04:05.60 |
+23:52:04.2 |
HIP 49478 |
28.01 |
| 2026-06-16 00:00 |
10:04:29.11 |
+23:48:26.2 |
HIP 49478 |
22.62 |
| 2026-06-16 12:00 |
10:04:52.73 |
+23:44:47.8 |
HIP 49478 |
17.96 |
| 2026-06-17 00:00 |
10:05:16.46 |
+23:41:09.2 |
HIP 49478 |
14.75 |
| 2026-06-17 12:00 |
10:05:40.31 |
+23:37:30.3 |
HIP 49478 |
14.06 |
| 2026-06-18 00:00 |
10:06:04.26 |
+23:33:51.2 |
HIP 49570 |
15.22 |
| 2026-06-18 12:00 |
10:06:28.32 |
+23:30:11.8 |
HIP 49570 |
11.30 |
| 2026-06-19 00:00 |
10:06:52.49 |
+23:26:32.2 |
HIP 49570 |
10.55 |
| 2026-06-19 12:00 |
10:07:16.76 |
+23:22:52.3 |
HIP 49570 |
13.54 |
| 2026-06-20 00:00 |
10:07:41.14 |
+23:19:12.1 |
HIP 49700 |
17.41 |
| 2026-06-20 12:00 |
10:08:05.61 |
+23:15:31.8 |
HIP 49700 |
16.00 |
| 2026-06-21 00:00 |
10:08:30.19 |
+23:11:51.1 |
HIP 49700 |
17.29 |
| 2026-06-21 12:00 |
10:08:54.87 |
+23:08:10.3 |
HIP 49700 |
20.80 |
| 2026-06-22 00:00 |
10:09:19.65 |
+23:04:29.2 |
HIP 49700 |
25.66 |