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) |
| 2026-07-29 00:00 |
02:14:51.81 |
+04:26:25.2 |
HIP 10596 |
26.07 |
| 2026-07-29 12:00 |
02:15:01.12 |
+04:26:26.9 |
HIP 10596 |
23.98 |
| 2026-07-30 00:00 |
02:15:10.28 |
+04:26:27.6 |
HIP 10596 |
21.98 |
| 2026-07-30 12:00 |
02:15:19.28 |
+04:26:27.3 |
HIP 10596 |
20.08 |
| 2026-07-31 00:00 |
02:15:28.12 |
+04:26:25.9 |
HIP 10596 |
18.30 |
| 2026-07-31 12:00 |
02:15:36.79 |
+04:26:23.6 |
HIP 10596 |
16.66 |
| 2026-08-01 00:00 |
02:15:45.31 |
+04:26:20.3 |
HIP 10596 |
15.19 |
| 2026-08-01 12:00 |
02:15:53.66 |
+04:26:16.0 |
HIP 10596 |
13.93 |
| 2026-08-02 00:00 |
02:16:01.85 |
+04:26:10.6 |
HIP 10596 |
12.93 |
| 2026-08-02 12:00 |
02:16:09.87 |
+04:26:04.3 |
HIP 10596 |
12.21 |
| 2026-08-03 00:00 |
02:16:17.73 |
+04:25:56.9 |
HIP 10596 |
11.81 |
| 2026-08-03 12:00 |
02:16:25.42 |
+04:25:48.6 |
HIP 10596 |
11.76 |
| 2026-08-04 00:00 |
02:16:32.95 |
+04:25:39.2 |
HIP 10662 |
10.97 |
| 2026-08-04 12:00 |
02:16:40.30 |
+04:25:28.8 |
HIP 10662 |
9.42 |
| 2026-08-05 00:00 |
02:16:47.49 |
+04:25:17.4 |
HIP 10662 |
8.03 |
| 2026-08-05 12:00 |
02:16:54.51 |
+04:25:05.0 |
HIP 10662 |
6.89 |
| 2026-08-06 00:00 |
02:17:01.35 |
+04:24:51.5 |
HIP 10662 |
6.08 |
| 2026-08-06 12:00 |
02:17:08.02 |
+04:24:37.1 |
HIP 10662 |
5.72 |
| 2026-08-07 00:00 |
02:17:14.52 |
+04:24:21.6 |
HIP 10662 |
5.86 |
| 2026-08-07 12:00 |
02:17:20.84 |
+04:24:05.1 |
HIP 10662 |
6.43 |
| 2026-08-08 00:00 |
02:17:26.99 |
+04:23:47.5 |
HIP 10662 |
7.30 |
| 2026-08-08 12:00 |
02:17:32.96 |
+04:23:29.0 |
HIP 10662 |
8.37 |
| 2026-08-09 00:00 |
02:17:38.76 |
+04:23:09.4 |
HIP 10662 |
9.54 |
| 2026-08-09 12:00 |
02:17:44.37 |
+04:22:48.8 |
HIP 10662 |
10.76 |
| 2026-08-10 00:00 |
02:17:49.81 |
+04:22:27.2 |
HIP 10662 |
12.01 |
| 2026-08-10 12:00 |
02:17:55.06 |
+04:22:04.6 |
HIP 10662 |
13.27 |
| 2026-08-11 00:00 |
02:18:00.14 |
+04:21:40.9 |
HIP 10775 |
14.20 |
| 2026-08-11 12:00 |
02:18:05.03 |
+04:21:16.2 |
HIP 10775 |
13.05 |
| 2026-08-12 00:00 |
02:18:09.74 |
+04:20:50.5 |
HIP 10775 |
11.94 |
| 2026-08-12 12:00 |
02:18:14.26 |
+04:20:23.8 |
HIP 10775 |
10.89 |
| 2026-08-13 00:00 |
02:18:18.61 |
+04:19:56.0 |
HIP 10775 |
9.88 |
| 2026-08-13 12:00 |
02:18:22.76 |
+04:19:27.3 |
HIP 10775 |
8.92 |
| 2026-08-14 00:00 |
02:18:26.73 |
+04:18:57.5 |
HIP 10775 |
8.01 |
| 2026-08-14 12:00 |
02:18:30.52 |
+04:18:26.7 |
HIP 10775 |
7.16 |
| 2026-08-15 00:00 |
02:18:34.11 |
+04:17:54.9 |
HIP 10775 |
6.37 |
| 2026-08-15 12:00 |
02:18:37.52 |
+04:17:22.1 |
HIP 10775 |
5.66 |
| 2026-08-16 00:00 |
02:18:40.75 |
+04:16:48.3 |
HIP 10775 |
5.04 |
| 2026-08-16 12:00 |
02:18:43.78 |
+04:16:13.5 |
HIP 10775 |
4.51 |
| 2026-08-17 00:00 |
02:18:46.62 |
+04:15:37.7 |
HIP 10775 |
4.11 |
| 2026-08-17 12:00 |
02:18:49.28 |
+04:15:01.0 |
HIP 10775 |
3.86 |
| 2026-08-18 00:00 |
02:18:51.74 |
+04:14:23.2 |
HIP 10775 |
3.76 |
| 2026-08-18 12:00 |
02:18:54.01 |
+04:13:44.4 |
HIP 10775 |
3.82 |
| 2026-08-19 00:00 |
02:18:56.09 |
+04:13:04.6 |
HIP 10775 |
4.01 |