메타데이터
| 항목 |
값 |
| Designation |
P/2019 A1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-11T01:01:39.613440Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:43:01Z |
| Obs used |
63 |
| NEO |
- |
| M1 |
17.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-01-03T15:02:41.568000Z |
| Discovery magnitude (MPC) |
20.50 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-01-18.0000000 |
| e |
0.56892834 |
| q (au) |
2.211667 |
| a (au) |
5.130625 |
| i (deg) |
13.743622 |
| Ω (om, deg) |
312.299496 |
| ω (w, deg) |
150.846750 |
| M (ma, deg) |
8.392589 |
밝기
산란 + 전체 선형
$$
M_a = (19.446 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.446 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.718 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
20:43:13.22 |
-20:44:41.4 |
HIP 102386 |
24.13 |
| 2026-03-26 12:00 |
20:43:25.30 |
-20:43:50.5 |
HIP 102386 |
21.89 |
| 2026-03-27 00:00 |
20:43:37.30 |
-20:43:00.0 |
HIP 102386 |
19.86 |
| 2026-03-27 12:00 |
20:43:49.21 |
-20:42:09.6 |
HIP 102386 |
18.08 |
| 2026-03-28 00:00 |
20:44:01.02 |
-20:41:19.7 |
HIP 102386 |
16.64 |
| 2026-03-28 12:00 |
20:44:12.75 |
-20:40:30.0 |
HIP 102386 |
15.60 |
| 2026-03-29 00:00 |
20:44:24.38 |
-20:39:40.7 |
HIP 102386 |
15.06 |
| 2026-03-29 12:00 |
20:44:35.92 |
-20:38:51.7 |
HIP 102386 |
15.03 |
| 2026-03-30 00:00 |
20:44:47.37 |
-20:38:03.1 |
HIP 102386 |
15.52 |
| 2026-03-30 12:00 |
20:44:58.73 |
-20:37:14.8 |
HIP 102386 |
16.47 |
| 2026-03-31 00:00 |
20:45:09.99 |
-20:36:26.8 |
HIP 102386 |
17.80 |
| 2026-03-31 12:00 |
20:45:21.16 |
-20:35:39.1 |
HIP 102386 |
19.41 |
| 2026-04-01 00:00 |
20:45:32.24 |
-20:34:51.8 |
HIP 102386 |
21.24 |
| 2026-04-01 12:00 |
20:45:43.21 |
-20:34:04.8 |
HIP 102386 |
23.22 |
| 2026-04-02 00:00 |
20:45:54.10 |
-20:33:18.2 |
HIP 102386 |
25.31 |
| 2026-04-02 12:00 |
20:46:04.88 |
-20:32:31.9 |
HIP 102386 |
27.49 |
| 2026-04-03 00:00 |
20:46:15.57 |
-20:31:46.0 |
HIP 102386 |
29.72 |
| 2026-04-03 12:00 |
20:46:26.16 |
-20:31:00.4 |
HIP 102386 |
31.98 |
| 2026-04-04 00:00 |
20:46:36.66 |
-20:30:15.2 |
HIP 102702 |
32.28 |
| 2026-04-04 12:00 |
20:46:47.05 |
-20:29:30.4 |
HIP 102702 |
30.66 |
| 2026-04-05 00:00 |
20:46:57.35 |
-20:28:45.9 |
HIP 102723 |
28.93 |
| 2026-04-05 12:00 |
20:47:07.54 |
-20:28:01.8 |
HIP 102723 |
26.90 |
| 2026-04-06 00:00 |
20:47:17.64 |
-20:27:18.0 |
HIP 102723 |
24.97 |
| 2026-04-06 12:00 |
20:47:27.63 |
-20:26:34.6 |
HIP 102723 |
23.16 |
| 2026-04-07 00:00 |
20:47:37.52 |
-20:25:51.6 |
HIP 102723 |
21.49 |
| 2026-04-07 12:00 |
20:47:47.31 |
-20:25:09.0 |
HIP 102723 |
19.99 |
| 2026-04-08 00:00 |
20:47:57.00 |
-20:24:26.7 |
HIP 102723 |
18.70 |
| 2026-04-08 12:00 |
20:48:06.58 |
-20:23:44.9 |
HIP 102723 |
17.64 |
| 2026-04-09 00:00 |
20:48:16.06 |
-20:23:03.4 |
HIP 102723 |
16.86 |
| 2026-04-09 12:00 |
20:48:25.43 |
-20:22:22.3 |
HIP 102723 |
16.37 |
| 2026-04-10 00:00 |
20:48:34.70 |
-20:21:41.6 |
HIP 102723 |
16.20 |
| 2026-04-10 12:00 |
20:48:43.86 |
-20:21:01.3 |
HIP 102723 |
16.35 |
| 2026-04-11 00:00 |
20:48:52.92 |
-20:20:21.4 |
HIP 102723 |
16.79 |
| 2026-04-11 12:00 |
20:49:01.86 |
-20:19:41.9 |
HIP 102723 |
17.50 |
| 2026-04-12 00:00 |
20:49:10.70 |
-20:19:02.8 |
HIP 102723 |
18.43 |
| 2026-04-12 12:00 |
20:49:19.43 |
-20:18:24.2 |
HIP 102762 |
19.44 |
| 2026-04-13 00:00 |
20:49:28.05 |
-20:17:45.9 |
HIP 102762 |
20.28 |
| 2026-04-13 12:00 |
20:49:36.56 |
-20:17:08.1 |
HIP 102762 |
21.29 |
| 2026-04-14 00:00 |
20:49:44.96 |
-20:16:30.6 |
HIP 102762 |
22.43 |
| 2026-04-14 12:00 |
20:49:53.25 |
-20:15:53.6 |
HIP 102762 |
23.68 |
| 2026-04-15 00:00 |
20:50:01.43 |
-20:15:17.0 |
HIP 102762 |
25.02 |
| 2026-04-15 12:00 |
20:50:09.49 |
-20:14:40.9 |
HIP 102762 |
26.42 |
| 2026-04-16 00:00 |
20:50:17.44 |
-20:14:05.2 |
HIP 102762 |
27.87 |