메타데이터
| 항목 |
값 |
| Designation |
P/2016 A7 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-02-25T20:41:32.879040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:21Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
33.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-03-18.0000000 |
| e |
0.56662578 |
| q (au) |
2.176649 |
| a (au) |
5.022563 |
| i (deg) |
16.637470 |
| Ω (om, deg) |
221.466093 |
| ω (w, deg) |
352.469583 |
| M (ma, deg) |
1.850871 |
밝기
산란 + 전체 선형
$$
M_a = (13.342 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.342 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
06:49:28.44 |
+09:14:21.1 |
HIP 32829 |
17.35 |
| 2026-05-12 12:00 |
06:49:57.84 |
+09:14:40.1 |
HIP 32829 |
10.09 |
| 2026-05-13 00:00 |
06:50:27.37 |
+09:14:58.2 |
HIP 32829 |
2.83 |
| 2026-05-13 12:00 |
06:50:57.04 |
+09:15:15.4 |
HIP 32829 |
4.56 |
| 2026-05-14 00:00 |
06:51:26.84 |
+09:15:31.7 |
HIP 32926 |
11.10 |
| 2026-05-14 12:00 |
06:51:56.79 |
+09:15:47.0 |
HIP 32926 |
11.82 |
| 2026-05-15 00:00 |
06:52:26.87 |
+09:16:01.3 |
HIP 32926 |
16.33 |
| 2026-05-15 12:00 |
06:52:57.08 |
+09:16:14.7 |
HIP 32926 |
22.48 |
| 2026-05-16 00:00 |
06:53:27.42 |
+09:16:27.2 |
HIP 33188 |
18.16 |
| 2026-05-16 12:00 |
06:53:57.90 |
+09:16:38.7 |
HIP 33188 |
12.80 |
| 2026-05-17 00:00 |
06:54:28.51 |
+09:16:49.2 |
HIP 33188 |
10.55 |
| 2026-05-17 12:00 |
06:54:59.25 |
+09:16:58.8 |
HIP 33188 |
13.18 |
| 2026-05-18 00:00 |
06:55:30.12 |
+09:17:07.4 |
HIP 33188 |
18.77 |
| 2026-05-18 12:00 |
06:56:01.12 |
+09:17:15.0 |
HIP 33317 |
24.81 |
| 2026-05-19 00:00 |
06:56:32.24 |
+09:17:21.7 |
HIP 33317 |
27.00 |
| 2026-05-19 12:00 |
06:57:03.49 |
+09:17:27.4 |
HIP 33317 |
31.00 |
| 2026-05-20 00:00 |
06:57:34.87 |
+09:17:32.1 |
HIP 33627 |
26.31 |
| 2026-05-20 12:00 |
06:58:06.37 |
+09:17:35.8 |
HIP 33627 |
19.70 |
| 2026-05-21 00:00 |
06:58:37.99 |
+09:17:38.6 |
HIP 33627 |
14.29 |
| 2026-05-21 12:00 |
06:59:09.74 |
+09:17:40.3 |
HIP 33627 |
11.94 |
| 2026-05-22 00:00 |
06:59:41.60 |
+09:17:41.1 |
HIP 33627 |
14.29 |
| 2026-05-22 12:00 |
07:00:13.59 |
+09:17:40.9 |
HIP 33627 |
19.77 |
| 2026-05-23 00:00 |
07:00:45.69 |
+09:17:39.7 |
HIP 33627 |
26.53 |
| 2026-05-23 12:00 |
07:01:17.92 |
+09:17:37.4 |
HIP 34002 |
31.05 |
| 2026-05-24 00:00 |
07:01:50.25 |
+09:17:34.2 |
HIP 34002 |
23.54 |
| 2026-05-24 12:00 |
07:02:22.71 |
+09:17:30.0 |
HIP 34002 |
16.44 |
| 2026-05-25 00:00 |
07:02:55.28 |
+09:17:24.8 |
HIP 34002 |
10.69 |
| 2026-05-25 12:00 |
07:03:27.97 |
+09:17:18.6 |
HIP 34002 |
9.34 |
| 2026-05-26 00:00 |
07:04:00.76 |
+09:17:11.4 |
HIP 34002 |
13.81 |
| 2026-05-26 12:00 |
07:04:33.67 |
+09:17:03.2 |
HIP 34215 |
17.17 |
| 2026-05-27 00:00 |
07:05:06.70 |
+09:16:53.9 |
HIP 34215 |
9.83 |
| 2026-05-27 12:00 |
07:05:39.83 |
+09:16:43.7 |
HIP 34215 |
5.58 |
| 2026-05-28 00:00 |
07:06:13.08 |
+09:16:32.4 |
HIP 34215 |
9.99 |
| 2026-05-28 12:00 |
07:06:46.43 |
+09:16:20.1 |
HIP 34215 |
17.43 |
| 2026-05-29 00:00 |
07:07:19.89 |
+09:16:06.8 |
HIP 34215 |
25.39 |
| 2026-05-29 12:00 |
07:07:53.46 |
+09:15:52.5 |
HIP 34588 |
29.13 |
| 2026-05-30 00:00 |
07:08:27.14 |
+09:15:37.2 |
HIP 34588 |
20.90 |
| 2026-05-30 12:00 |
07:09:00.92 |
+09:15:20.8 |
HIP 34588 |
12.77 |
| 2026-05-31 00:00 |
07:09:34.81 |
+09:15:03.5 |
HIP 34588 |
5.30 |
| 2026-05-31 12:00 |
07:10:08.81 |
+09:14:45.0 |
HIP 34588 |
5.79 |
| 2026-06-01 00:00 |
07:10:42.90 |
+09:14:25.6 |
HIP 34672 |
8.42 |
| 2026-06-01 12:00 |
07:11:17.11 |
+09:14:05.1 |
HIP 34672 |
10.91 |
| 2026-06-02 00:00 |
07:11:51.41 |
+09:13:43.6 |
HIP 34672 |
17.62 |