메타데이터
| 항목 |
값 |
| Designation |
P/2019 U4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-18T08:38:38.333760Z |
| Orbit solution date (soln_date, UTC) |
2021-11-09T14:03:17Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
18.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-10-25T12:45:41.212800Z |
| Discovery magnitude (MPC) |
21.11 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-10-19.0000000 |
| e |
0.47518301 |
| q (au) |
1.847129 |
| a (au) |
3.519568 |
| i (deg) |
11.692289 |
| Ω (om, deg) |
200.040609 |
| ω (w, deg) |
180.960217 |
| M (ma, deg) |
4.573581 |
밝기
산란 + 전체 선형
$$
M_a = (19.329 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.329 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.681 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
02:14:29.72 |
+12:26:46.6 |
HIP 10415 |
10.60 |
| 2026-05-12 12:00 |
02:15:46.52 |
+12:31:18.7 |
HIP 10599 |
13.14 |
| 2026-05-13 00:00 |
02:17:03.34 |
+12:35:49.1 |
HIP 10599 |
15.66 |
| 2026-05-13 12:00 |
02:18:20.17 |
+12:40:17.8 |
HIP 10784 |
20.74 |
| 2026-05-14 00:00 |
02:19:37.02 |
+12:44:44.8 |
HIP 10784 |
18.40 |
| 2026-05-14 12:00 |
02:20:53.88 |
+12:49:10.1 |
HIP 11042 |
28.82 |
| 2026-05-15 00:00 |
02:22:10.74 |
+12:53:33.7 |
HIP 11042 |
17.32 |
| 2026-05-15 12:00 |
02:23:27.62 |
+12:57:55.5 |
HIP 11042 |
22.58 |
| 2026-05-16 00:00 |
02:24:44.52 |
+13:02:15.6 |
HIP 11280 |
13.85 |
| 2026-05-16 12:00 |
02:26:01.41 |
+13:06:33.9 |
HIP 11369 |
14.08 |
| 2026-05-17 00:00 |
02:27:18.32 |
+13:10:50.5 |
HIP 11461 |
15.51 |
| 2026-05-17 12:00 |
02:28:35.24 |
+13:15:05.2 |
HIP 11461 |
20.73 |
| 2026-05-18 00:00 |
02:29:52.16 |
+13:19:18.2 |
HIP 11691 |
14.99 |
| 2026-05-18 12:00 |
02:31:09.08 |
+13:23:29.3 |
HIP 11691 |
5.68 |
| 2026-05-19 00:00 |
02:32:26.02 |
+13:27:38.5 |
HIP 11884 |
14.59 |
| 2026-05-19 12:00 |
02:33:42.95 |
+13:31:46.0 |
HIP 11884 |
7.61 |
| 2026-05-20 00:00 |
02:34:59.89 |
+13:35:51.5 |
HIP 12079 |
16.75 |
| 2026-05-20 12:00 |
02:36:16.83 |
+13:39:55.2 |
HIP 12137 |
0.71 |
| 2026-05-21 00:00 |
02:37:33.77 |
+13:43:57.0 |
HIP 12137 |
18.41 |
| 2026-05-21 12:00 |
02:38:50.71 |
+13:47:56.9 |
HIP 12258 |
25.81 |
| 2026-05-22 00:00 |
02:40:07.65 |
+13:51:54.9 |
HIP 12461 |
20.82 |
| 2026-05-22 12:00 |
02:41:24.58 |
+13:55:51.0 |
HIP 12461 |
27.96 |
| 2026-05-23 00:00 |
02:42:41.52 |
+13:59:45.2 |
HIP 12710 |
35.17 |
| 2026-05-23 12:00 |
02:43:58.45 |
+14:03:37.4 |
HIP 12838 |
18.80 |
| 2026-05-24 00:00 |
02:45:15.38 |
+14:07:27.7 |
HIP 12838 |
7.49 |
| 2026-05-24 12:00 |
02:46:32.31 |
+14:11:16.0 |
HIP 12838 |
21.99 |
| 2026-05-25 00:00 |
02:47:49.23 |
+14:15:02.4 |
HIP 13122 |
25.85 |
| 2026-05-25 12:00 |
02:49:06.14 |
+14:18:46.8 |
HIP 13122 |
18.64 |
| 2026-05-26 00:00 |
02:50:23.05 |
+14:22:29.2 |
HIP 13122 |
27.36 |
| 2026-05-26 12:00 |
02:51:39.95 |
+14:26:09.6 |
HIP 13484 |
31.94 |
| 2026-05-27 00:00 |
02:52:56.85 |
+14:29:48.0 |
HIP 13484 |
14.49 |
| 2026-05-27 12:00 |
02:54:13.73 |
+14:33:24.4 |
HIP 13484 |
10.91 |
| 2026-05-28 00:00 |
02:55:30.61 |
+14:36:58.8 |
HIP 13643 |
5.91 |
| 2026-05-28 12:00 |
02:56:47.47 |
+14:40:31.1 |
HIP 13643 |
16.36 |
| 2026-05-29 00:00 |
02:58:04.33 |
+14:44:01.5 |
HIP 13871 |
26.60 |
| 2026-05-29 12:00 |
02:59:21.18 |
+14:47:29.7 |
HIP 13871 |
24.04 |
| 2026-05-30 00:00 |
03:00:38.01 |
+14:50:55.9 |
HIP 14048 |
11.57 |
| 2026-05-30 12:00 |
03:01:54.83 |
+14:54:20.1 |
HIP 14069 |
10.17 |
| 2026-05-31 00:00 |
03:03:11.63 |
+14:57:42.2 |
HIP 14069 |
27.65 |
| 2026-05-31 12:00 |
03:04:28.43 |
+15:01:02.2 |
HIP 14236 |
35.39 |
| 2026-06-01 00:00 |
03:05:45.20 |
+15:04:20.1 |
HIP 14497 |
23.46 |
| 2026-06-01 12:00 |
03:07:01.96 |
+15:07:35.9 |
HIP 14497 |
5.82 |
| 2026-06-02 00:00 |
03:08:18.71 |
+15:10:49.7 |
HIP 14614 |
11.15 |