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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
03:09:35.44 |
+15:14:01.3 |
HIP 14705 |
10.25 |
| 2026-06-03 00:00 |
03:10:52.14 |
+15:17:10.8 |
HIP 14705 |
13.69 |
| 2026-06-03 12:00 |
03:12:08.83 |
+15:20:18.2 |
HIP 14909 |
18.16 |
| 2026-06-04 00:00 |
03:13:25.51 |
+15:23:23.4 |
HIP 15064 |
15.86 |
| 2026-06-04 12:00 |
03:14:42.15 |
+15:26:26.5 |
HIP 15109 |
5.82 |
| 2026-06-05 00:00 |
03:15:58.78 |
+15:29:27.5 |
HIP 15249 |
14.53 |
| 2026-06-05 12:00 |
03:17:15.39 |
+15:32:26.3 |
HIP 15283 |
8.09 |
| 2026-06-06 00:00 |
03:18:31.97 |
+15:35:22.9 |
HIP 15525 |
22.18 |
| 2026-06-06 12:00 |
03:19:48.53 |
+15:38:17.4 |
HIP 15525 |
3.57 |
| 2026-06-07 00:00 |
03:21:05.06 |
+15:41:09.7 |
HIP 15525 |
15.15 |
| 2026-06-07 12:00 |
03:22:21.57 |
+15:43:59.8 |
HIP 15805 |
18.62 |
| 2026-06-08 00:00 |
03:23:38.04 |
+15:46:47.7 |
HIP 15805 |
6.73 |
| 2026-06-08 12:00 |
03:24:54.49 |
+15:49:33.4 |
HIP 15951 |
6.94 |
| 2026-06-09 00:00 |
03:26:10.92 |
+15:52:16.9 |
HIP 15951 |
11.75 |
| 2026-06-09 12:00 |
03:27:27.31 |
+15:54:58.2 |
HIP 16176 |
16.61 |
| 2026-06-10 00:00 |
03:28:43.66 |
+15:57:37.3 |
HIP 16176 |
8.83 |
| 2026-06-10 12:00 |
03:30:00.00 |
+16:00:14.2 |
HIP 16241 |
15.18 |
| 2026-06-11 00:00 |
03:31:16.28 |
+16:02:48.8 |
HIP 16393 |
18.80 |
| 2026-06-11 12:00 |
03:32:32.54 |
+16:05:21.2 |
HIP 16393 |
29.65 |
| 2026-06-12 00:00 |
03:33:48.76 |
+16:07:51.3 |
HIP 16627 |
30.37 |
| 2026-06-12 12:00 |
03:35:04.94 |
+16:10:19.2 |
HIP 16788 |
22.63 |
| 2026-06-13 00:00 |
03:36:21.08 |
+16:12:44.9 |
HIP 16788 |
15.92 |
| 2026-06-13 12:00 |
03:37:37.19 |
+16:15:08.3 |
HIP 16788 |
25.97 |
| 2026-06-14 00:00 |
03:38:53.25 |
+16:17:29.4 |
HIP 17121 |
16.61 |
| 2026-06-14 12:00 |
03:40:09.26 |
+16:19:48.2 |
HIP 17121 |
2.81 |
| 2026-06-15 00:00 |
03:41:25.24 |
+16:22:04.7 |
HIP 17121 |
20.38 |
| 2026-06-15 12:00 |
03:42:41.16 |
+16:24:19.0 |
HIP 17405 |
21.99 |
| 2026-06-16 00:00 |
03:43:57.04 |
+16:26:31.0 |
HIP 17405 |
13.86 |
| 2026-06-16 12:00 |
03:45:12.87 |
+16:28:40.7 |
HIP 17610 |
17.38 |
| 2026-06-17 00:00 |
03:46:28.66 |
+16:30:48.0 |
HIP 17610 |
8.58 |
| 2026-06-17 12:00 |
03:47:44.38 |
+16:32:53.1 |
HIP 17708 |
9.78 |
| 2026-06-18 00:00 |
03:49:00.06 |
+16:34:55.9 |
HIP 17830 |
7.40 |
| 2026-06-18 12:00 |
03:50:15.68 |
+16:36:56.4 |
HIP 17830 |
21.22 |
| 2026-06-19 00:00 |
03:51:31.25 |
+16:38:54.5 |
HIP 18222 |
36.36 |
| 2026-06-19 12:00 |
03:52:46.76 |
+16:40:50.4 |
HIP 18222 |
20.59 |
| 2026-06-20 00:00 |
03:54:02.22 |
+16:42:43.9 |
HIP 18267 |
8.42 |
| 2026-06-20 12:00 |
03:55:17.61 |
+16:44:35.2 |
HIP 18267 |
14.12 |
| 2026-06-21 00:00 |
03:56:32.95 |
+16:46:24.1 |
HIP 18327 |
24.72 |
| 2026-06-21 12:00 |
03:57:48.23 |
+16:48:10.7 |
HIP 18609 |
17.18 |
| 2026-06-22 00:00 |
03:59:03.44 |
+16:49:54.9 |
HIP 18609 |
4.72 |