메타데이터
| 항목 |
값 |
| Designation |
C/2019 A5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-06-09T10:42:31.567680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:51Z |
| Obs used |
70 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
12.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-01-13T11:48:30.528000Z |
| Discovery magnitude (MPC) |
21.50 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-08-06.0000000 |
| e |
0.70787404 |
| q (au) |
6.324147 |
| a (au) |
21.648700 |
| i (deg) |
67.539002 |
| Ω (om, deg) |
146.619252 |
| ω (w, deg) |
356.039843 |
| M (ma, deg) |
0.563158 |
밝기
산란 + 전체 선형
$$
M_a = (10.399 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.399 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.862 |
| 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 |
18:19:57.34 |
+40:38:00.9 |
HIP 89764 |
20.28 |
| 2026-03-26 12:00 |
18:19:59.46 |
+40:39:39.9 |
HIP 89764 |
19.08 |
| 2026-03-27 00:00 |
18:20:01.49 |
+40:41:18.9 |
HIP 89764 |
17.95 |
| 2026-03-27 12:00 |
18:20:03.42 |
+40:42:57.8 |
HIP 89764 |
16.90 |
| 2026-03-28 00:00 |
18:20:05.25 |
+40:44:36.7 |
HIP 89764 |
15.95 |
| 2026-03-28 12:00 |
18:20:06.99 |
+40:46:15.6 |
HIP 89764 |
15.11 |
| 2026-03-29 00:00 |
18:20:08.64 |
+40:47:54.4 |
HIP 89764 |
14.41 |
| 2026-03-29 12:00 |
18:20:10.19 |
+40:49:33.2 |
HIP 89764 |
13.85 |
| 2026-03-30 00:00 |
18:20:11.64 |
+40:51:11.9 |
HIP 89764 |
13.47 |
| 2026-03-30 12:00 |
18:20:13.00 |
+40:52:50.6 |
HIP 89764 |
13.27 |
| 2026-03-31 00:00 |
18:20:14.26 |
+40:54:29.1 |
HIP 89764 |
13.26 |
| 2026-03-31 12:00 |
18:20:15.43 |
+40:56:07.6 |
HIP 89764 |
13.43 |
| 2026-04-01 00:00 |
18:20:16.50 |
+40:57:46.0 |
HIP 89764 |
13.79 |
| 2026-04-01 12:00 |
18:20:17.47 |
+40:59:24.3 |
HIP 89764 |
14.31 |
| 2026-04-02 00:00 |
18:20:18.35 |
+41:01:02.5 |
HIP 89764 |
14.98 |
| 2026-04-02 12:00 |
18:20:19.13 |
+41:02:40.5 |
HIP 89764 |
15.77 |
| 2026-04-03 00:00 |
18:20:19.82 |
+41:04:18.5 |
HIP 89764 |
16.67 |
| 2026-04-03 12:00 |
18:20:20.41 |
+41:05:56.3 |
HIP 89927 |
15.34 |
| 2026-04-04 00:00 |
18:20:20.90 |
+41:07:34.0 |
HIP 89927 |
13.87 |
| 2026-04-04 12:00 |
18:20:21.30 |
+41:09:11.5 |
HIP 89927 |
12.44 |
| 2026-04-05 00:00 |
18:20:21.60 |
+41:10:48.9 |
HIP 89927 |
11.09 |
| 2026-04-05 12:00 |
18:20:21.81 |
+41:12:26.1 |
HIP 89927 |
9.83 |
| 2026-04-06 00:00 |
18:20:21.92 |
+41:14:03.1 |
HIP 89927 |
8.70 |
| 2026-04-06 12:00 |
18:20:21.93 |
+41:15:39.9 |
HIP 89927 |
7.77 |
| 2026-04-07 00:00 |
18:20:21.85 |
+41:17:16.6 |
HIP 89927 |
7.10 |
| 2026-04-07 12:00 |
18:20:21.67 |
+41:18:53.1 |
HIP 89927 |
6.79 |
| 2026-04-08 00:00 |
18:20:21.39 |
+41:20:29.3 |
HIP 89927 |
6.86 |
| 2026-04-08 12:00 |
18:20:21.02 |
+41:22:05.4 |
HIP 89927 |
7.31 |
| 2026-04-09 00:00 |
18:20:20.56 |
+41:23:41.2 |
HIP 89927 |
8.07 |
| 2026-04-09 12:00 |
18:20:19.99 |
+41:25:16.8 |
HIP 89927 |
9.06 |
| 2026-04-10 00:00 |
18:20:19.33 |
+41:26:52.1 |
HIP 89927 |
10.22 |
| 2026-04-10 12:00 |
18:20:18.58 |
+41:28:27.2 |
HIP 89927 |
11.49 |
| 2026-04-11 00:00 |
18:20:17.72 |
+41:30:02.1 |
HIP 89927 |
12.84 |
| 2026-04-11 12:00 |
18:20:16.78 |
+41:31:36.6 |
HIP 89927 |
14.25 |
| 2026-04-12 00:00 |
18:20:15.73 |
+41:33:10.9 |
HIP 89927 |
15.69 |
| 2026-04-12 12:00 |
18:20:14.59 |
+41:34:45.0 |
HIP 89927 |
17.16 |
| 2026-04-13 00:00 |
18:20:13.36 |
+41:36:18.7 |
HIP 89927 |
18.66 |
| 2026-04-13 12:00 |
18:20:12.03 |
+41:37:52.1 |
HIP 89927 |
20.17 |
| 2026-04-14 00:00 |
18:20:10.60 |
+41:39:25.2 |
HIP 89820 |
21.07 |
| 2026-04-14 12:00 |
18:20:09.08 |
+41:40:58.0 |
HIP 89820 |
19.49 |
| 2026-04-15 00:00 |
18:20:07.46 |
+41:42:30.5 |
HIP 89820 |
17.92 |
| 2026-04-15 12:00 |
18:20:05.75 |
+41:44:02.6 |
HIP 89820 |
16.35 |
| 2026-04-16 00:00 |
18:20:03.94 |
+41:45:34.4 |
HIP 89820 |
14.79 |