메타데이터
| 항목 |
값 |
| Designation |
394P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-11-30T03:51:06.033600Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T17:31:58Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-09-13.0000000 |
| e |
0.36911578 |
| q (au) |
2.737095 |
| a (au) |
4.338507 |
| i (deg) |
8.527558 |
| Ω (om, deg) |
98.139243 |
| ω (w, deg) |
54.497804 |
| M (ma, deg) |
271.856301 |
밝기
산란 + 전체 선형
$$
M_a = (17.004 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.004 |
| n |
2.000 |
| gf |
0.937 |
| gb |
-0.901 |
| k |
0.998 |
| δ90 |
1.000 |
| 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 |
01:43:01.35 |
+02:40:01.7 |
HIP 8116 |
19.73 |
| 2026-06-01 12:00 |
01:43:22.89 |
+02:41:42.6 |
HIP 8116 |
14.89 |
| 2026-06-02 00:00 |
01:43:44.38 |
+02:43:22.9 |
HIP 8116 |
10.86 |
| 2026-06-02 12:00 |
01:44:05.81 |
+02:45:02.5 |
HIP 8116 |
8.78 |
| 2026-06-03 00:00 |
01:44:27.18 |
+02:46:41.4 |
HIP 8116 |
9.95 |
| 2026-06-03 12:00 |
01:44:48.49 |
+02:48:19.6 |
HIP 8116 |
13.52 |
| 2026-06-04 00:00 |
01:45:09.74 |
+02:49:57.2 |
HIP 8116 |
18.10 |
| 2026-06-04 12:00 |
01:45:30.92 |
+02:51:34.1 |
HIP 8173 |
22.34 |
| 2026-06-05 00:00 |
01:45:52.05 |
+02:53:10.2 |
HIP 8173 |
25.81 |
| 2026-06-05 12:00 |
01:46:13.12 |
+02:54:45.7 |
HIP 8173 |
29.89 |
| 2026-06-06 00:00 |
01:46:34.12 |
+02:56:20.5 |
HIP 8392 |
28.60 |
| 2026-06-06 12:00 |
01:46:55.06 |
+02:57:54.6 |
HIP 8392 |
25.06 |
| 2026-06-07 00:00 |
01:47:15.93 |
+02:59:28.0 |
HIP 8392 |
22.30 |
| 2026-06-07 12:00 |
01:47:36.74 |
+03:01:00.7 |
HIP 8392 |
20.64 |
| 2026-06-08 00:00 |
01:47:57.48 |
+03:02:32.7 |
HIP 8392 |
20.32 |
| 2026-06-08 12:00 |
01:48:18.16 |
+03:04:04.0 |
HIP 8392 |
21.40 |
| 2026-06-09 00:00 |
01:48:38.76 |
+03:05:34.5 |
HIP 8392 |
23.66 |
| 2026-06-09 12:00 |
01:48:59.30 |
+03:07:04.3 |
HIP 8392 |
26.80 |
| 2026-06-10 00:00 |
01:49:19.77 |
+03:08:33.4 |
HIP 8392 |
30.54 |
| 2026-06-10 12:00 |
01:49:40.17 |
+03:10:01.8 |
HIP 8392 |
34.68 |
| 2026-06-11 00:00 |
01:50:00.50 |
+03:11:29.4 |
HIP 8651 |
35.41 |
| 2026-06-11 12:00 |
01:50:20.76 |
+03:12:56.3 |
HIP 8651 |
33.74 |
| 2026-06-12 00:00 |
01:50:40.94 |
+03:14:22.4 |
HIP 8651 |
32.82 |
| 2026-06-12 12:00 |
01:51:01.06 |
+03:15:47.8 |
HIP 8651 |
32.73 |
| 2026-06-13 00:00 |
01:51:21.09 |
+03:17:12.4 |
HIP 8651 |
33.44 |
| 2026-06-13 12:00 |
01:51:41.05 |
+03:18:36.3 |
HIP 8833 |
28.98 |
| 2026-06-14 00:00 |
01:52:00.94 |
+03:19:59.4 |
HIP 8833 |
24.66 |
| 2026-06-14 12:00 |
01:52:20.75 |
+03:21:21.8 |
HIP 8833 |
20.75 |
| 2026-06-15 00:00 |
01:52:40.47 |
+03:22:43.4 |
HIP 8833 |
17.49 |
| 2026-06-15 12:00 |
01:53:00.12 |
+03:24:04.2 |
HIP 8833 |
15.27 |
| 2026-06-16 00:00 |
01:53:19.70 |
+03:25:24.2 |
HIP 8833 |
14.56 |
| 2026-06-16 12:00 |
01:53:39.19 |
+03:26:43.5 |
HIP 8833 |
15.54 |
| 2026-06-17 00:00 |
01:53:58.59 |
+03:28:01.9 |
HIP 8833 |
17.93 |
| 2026-06-17 12:00 |
01:54:17.92 |
+03:29:19.6 |
HIP 8971 |
20.28 |
| 2026-06-18 00:00 |
01:54:37.16 |
+03:30:36.5 |
HIP 8971 |
15.31 |
| 2026-06-18 12:00 |
01:54:56.32 |
+03:31:52.6 |
HIP 8971 |
10.36 |
| 2026-06-19 00:00 |
01:55:15.39 |
+03:33:07.9 |
HIP 8971 |
5.44 |
| 2026-06-19 12:00 |
01:55:34.38 |
+03:34:22.4 |
HIP 8971 |
0.57 |
| 2026-06-20 00:00 |
01:55:53.28 |
+03:35:36.1 |
HIP 8971 |
4.34 |
| 2026-06-20 12:00 |
01:56:12.09 |
+03:36:49.0 |
HIP 8971 |
9.18 |
| 2026-06-21 00:00 |
01:56:30.82 |
+03:38:01.1 |
HIP 8971 |
14.01 |
| 2026-06-21 12:00 |
01:56:49.46 |
+03:39:12.4 |
HIP 8971 |
18.81 |
| 2026-06-22 00:00 |
01:57:08.01 |
+03:40:22.9 |
HIP 9156 |
19.56 |