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 |
-0.500 |
| 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) |
| 2026-09-25 00:00 |
09:49:00.01 |
-00:09:21.1 |
HIP 48252 |
18.57 |
| 2026-09-25 12:00 |
09:49:43.68 |
-00:13:44.3 |
HIP 48252 |
7.14 |
| 2026-09-26 00:00 |
09:50:27.33 |
-00:18:08.4 |
HIP 48252 |
5.82 |
| 2026-09-26 12:00 |
09:51:10.98 |
-00:22:33.3 |
HIP 48252 |
17.15 |
| 2026-09-27 00:00 |
09:51:54.63 |
-00:26:58.9 |
HIP 48252 |
28.84 |
| 2026-09-27 12:00 |
09:52:38.28 |
-00:31:25.4 |
HIP 48590 |
29.85 |
| 2026-09-28 00:00 |
09:53:21.92 |
-00:35:52.6 |
HIP 48590 |
21.47 |
| 2026-09-28 12:00 |
09:54:05.55 |
-00:40:20.6 |
HIP 48590 |
17.58 |
| 2026-09-29 00:00 |
09:54:49.18 |
-00:44:49.4 |
HIP 48590 |
20.86 |
| 2026-09-29 12:00 |
09:55:32.81 |
-00:49:19.0 |
HIP 48671 |
18.26 |
| 2026-09-30 00:00 |
09:56:16.42 |
-00:53:49.4 |
HIP 48671 |
17.19 |
| 2026-09-30 12:00 |
09:57:00.04 |
-00:58:20.5 |
HIP 48671 |
23.14 |
| 2026-10-01 00:00 |
09:57:43.64 |
-01:02:52.4 |
HIP 48671 |
32.46 |
| 2026-10-01 12:00 |
09:58:27.24 |
-01:07:25.1 |
HIP 49037 |
27.87 |
| 2026-10-02 00:00 |
09:59:10.84 |
-01:11:58.5 |
HIP 49037 |
18.75 |
| 2026-10-02 12:00 |
09:59:54.42 |
-01:16:32.7 |
HIP 49037 |
14.33 |
| 2026-10-03 00:00 |
10:00:38.00 |
-01:21:07.7 |
HIP 49037 |
18.41 |
| 2026-10-03 12:00 |
10:01:21.57 |
-01:25:43.3 |
HIP 49125 |
24.88 |
| 2026-10-04 00:00 |
10:02:05.14 |
-01:30:19.8 |
HIP 49221 |
28.49 |
| 2026-10-04 12:00 |
10:02:48.69 |
-01:34:56.9 |
HIP 49335 |
22.94 |
| 2026-10-05 00:00 |
10:03:32.23 |
-01:39:34.8 |
HIP 49335 |
11.26 |
| 2026-10-05 12:00 |
10:04:15.77 |
-01:44:13.4 |
HIP 49335 |
2.67 |
| 2026-10-06 00:00 |
10:04:59.29 |
-01:48:52.8 |
HIP 49335 |
12.94 |
| 2026-10-06 12:00 |
10:05:42.80 |
-01:53:32.8 |
HIP 49540 |
20.39 |
| 2026-10-07 00:00 |
10:06:26.30 |
-01:58:13.6 |
HIP 49540 |
16.30 |
| 2026-10-07 12:00 |
10:07:09.79 |
-02:02:55.0 |
HIP 49540 |
19.90 |
| 2026-10-08 00:00 |
10:07:53.27 |
-02:07:37.2 |
HIP 49528 |
23.49 |
| 2026-10-08 12:00 |
10:08:36.73 |
-02:12:20.0 |
HIP 49643 |
21.48 |
| 2026-10-09 00:00 |
10:09:20.18 |
-02:17:03.5 |
HIP 49643 |
25.25 |
| 2026-10-09 12:00 |
10:10:03.62 |
-02:21:47.7 |
HIP 49871 |
14.74 |
| 2026-10-10 00:00 |
10:10:47.04 |
-02:26:32.6 |
HIP 49871 |
3.93 |
| 2026-10-10 12:00 |
10:11:30.45 |
-02:31:18.1 |
HIP 49871 |
9.69 |
| 2026-10-11 00:00 |
10:12:13.84 |
-02:36:04.2 |
HIP 49969 |
5.46 |
| 2026-10-11 12:00 |
10:12:57.22 |
-02:40:51.0 |
HIP 49969 |
13.19 |
| 2026-10-12 00:00 |
10:13:40.58 |
-02:45:38.5 |
HIP 50187 |
16.95 |
| 2026-10-12 12:00 |
10:14:23.92 |
-02:50:26.6 |
HIP 50187 |
5.11 |
| 2026-10-13 00:00 |
10:15:07.25 |
-02:55:15.3 |
HIP 50187 |
6.73 |
| 2026-10-13 12:00 |
10:15:50.56 |
-03:00:04.6 |
HIP 50187 |
18.57 |
| 2026-10-14 00:00 |
10:16:33.85 |
-03:04:54.6 |
HIP 50343 |
17.36 |
| 2026-10-14 12:00 |
10:17:17.12 |
-03:09:45.1 |
HIP 50404 |
22.58 |
| 2026-10-15 00:00 |
10:18:00.37 |
-03:14:36.3 |
HIP 50404 |
18.84 |
| 2026-10-15 12:00 |
10:18:43.61 |
-03:19:28.1 |
HIP 50404 |
21.90 |
| 2026-10-16 00:00 |
10:19:26.82 |
-03:24:20.4 |
HIP 50404 |
29.73 |