P/2017 D1 (Fuls)
메타데이터
| 항목 |
값 |
| Designation |
P/2017 D1 (Fuls) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-06-28T07:02:48.923520Z |
| Orbit solution date (soln_date, UTC) |
2022-07-31T01:43:22Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
17.100 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-08-01.0000000 |
| e |
0.44033406 |
| q (au) |
2.687798 |
| a (au) |
4.802504 |
| i (deg) |
20.732652 |
| Ω (om, deg) |
82.335656 |
| ω (w, deg) |
7.257406 |
| M (ma, deg) |
3.156564 |
밝기
산란 + 전체 선형
$$
M_a = (12.621 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.621 |
| n |
6.000 |
| gf |
0.988 |
| gb |
-0.920 |
| k |
0.995 |
| δ90 |
9.860 |
| 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) |
| 2026-02-03 00:00 |
00:30:24.72 |
-15:00:09.0 |
HIP 2389 |
7.32 |
| 2026-02-03 12:00 |
00:30:53.34 |
-14:54:58.1 |
HIP 2389 |
13.90 |
| 2026-02-04 00:00 |
00:31:22.08 |
-14:49:47.1 |
HIP 2571 |
18.89 |
| 2026-02-04 12:00 |
00:31:50.93 |
-14:44:36.0 |
HIP 2571 |
14.83 |
| 2026-02-05 00:00 |
00:32:19.91 |
-14:39:24.6 |
HIP 2571 |
15.28 |
| 2026-02-05 12:00 |
00:32:49.00 |
-14:34:13.2 |
HIP 2571 |
19.99 |
| 2026-02-06 00:00 |
00:33:18.22 |
-14:29:01.5 |
HIP 2571 |
26.81 |
| 2026-02-06 12:00 |
00:33:47.54 |
-14:23:49.8 |
HIP 2800 |
33.71 |
| 2026-02-07 00:00 |
00:34:16.99 |
-14:18:37.9 |
HIP 2776 |
28.92 |
| 2026-02-07 12:00 |
00:34:46.54 |
-14:13:25.9 |
HIP 2776 |
20.73 |
| 2026-02-08 00:00 |
00:35:16.22 |
-14:08:13.7 |
HIP 2776 |
13.38 |
| 2026-02-08 12:00 |
00:35:46.00 |
-14:03:01.4 |
HIP 2776 |
9.29 |
| 2026-02-09 00:00 |
00:36:15.90 |
-13:57:49.1 |
HIP 2776 |
12.37 |
| 2026-02-09 12:00 |
00:36:45.91 |
-13:52:36.6 |
HIP 2776 |
19.50 |
| 2026-02-10 00:00 |
00:37:16.03 |
-13:47:24.0 |
HIP 2776 |
27.74 |
| 2026-02-10 12:00 |
00:37:46.26 |
-13:42:11.2 |
HIP 3039 |
34.27 |
| 2026-02-11 00:00 |
00:38:16.60 |
-13:36:58.4 |
HIP 3151 |
30.64 |
| 2026-02-11 12:00 |
00:38:47.05 |
-13:31:45.5 |
HIP 3151 |
28.34 |
| 2026-02-12 00:00 |
00:39:17.61 |
-13:26:32.6 |
HIP 3151 |
28.83 |
| 2026-02-12 12:00 |
00:39:48.28 |
-13:21:19.5 |
HIP 3249 |
25.80 |
| 2026-02-13 00:00 |
00:40:19.05 |
-13:16:06.4 |
HIP 3249 |
16.88 |
| 2026-02-13 12:00 |
00:40:49.93 |
-13:10:53.2 |
HIP 3249 |
8.36 |
| 2026-02-14 00:00 |
00:41:20.92 |
-13:05:39.9 |
HIP 3249 |
4.74 |
| 2026-02-14 12:00 |
00:41:52.01 |
-13:00:26.6 |
HIP 3249 |
11.99 |
| 2026-02-15 00:00 |
00:42:23.20 |
-12:55:13.2 |
HIP 3255 |
19.17 |
| 2026-02-15 12:00 |
00:42:54.50 |
-12:49:59.8 |
HIP 3255 |
22.63 |
| 2026-02-16 00:00 |
00:43:25.90 |
-12:44:46.3 |
HIP 3255 |
28.80 |
| 2026-02-16 12:00 |
00:43:57.40 |
-12:39:32.8 |
HIP 3559 |
25.92 |
| 2026-02-17 00:00 |
00:44:29.00 |
-12:34:19.2 |
HIP 3559 |
23.54 |
| 2026-02-17 12:00 |
00:45:00.70 |
-12:29:05.7 |
HIP 3526 |
20.44 |
| 2026-02-18 00:00 |
00:45:32.50 |
-12:23:52.1 |
HIP 3526 |
17.21 |
| 2026-02-18 12:00 |
00:46:04.40 |
-12:18:38.5 |
HIP 3526 |
18.73 |
| 2026-02-19 00:00 |
00:46:36.39 |
-12:13:24.9 |
HIP 3678 |
22.11 |
| 2026-02-19 12:00 |
00:47:08.49 |
-12:08:11.3 |
HIP 3678 |
15.92 |
| 2026-02-20 00:00 |
00:47:40.68 |
-12:02:57.8 |
HIP 3678 |
14.02 |
| 2026-02-20 12:00 |
00:48:12.96 |
-11:57:44.2 |
HIP 3678 |
17.87 |
| 2026-02-21 00:00 |
00:48:45.34 |
-11:52:30.6 |
HIP 3678 |
24.95 |
| 2026-02-21 12:00 |
00:49:17.81 |
-11:47:17.1 |
HIP 3678 |
33.28 |
| 2026-02-22 00:00 |
00:49:50.37 |
-11:42:03.6 |
HIP 4074 |
36.70 |
| 2026-02-22 12:00 |
00:50:23.03 |
-11:36:50.2 |
HIP 4074 |
31.31 |
| 2026-02-23 00:00 |
00:50:55.77 |
-11:31:36.7 |
HIP 4074 |
28.19 |
| 2026-02-23 12:00 |
00:51:28.61 |
-11:26:23.4 |
HIP 4074 |
28.14 |
| 2026-02-24 00:00 |
00:52:01.54 |
-11:21:10.1 |
HIP 4009 |
29.20 |