메타데이터
| 항목 |
값 |
| Designation |
P/2024 FG9 (Nanshan-Hahn) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-20T07:32:21.894720Z |
| Orbit solution date (soln_date, UTC) |
2024-10-26T00:12:24Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
32.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-01-04.0000000 |
| e |
0.50988575 |
| q (au) |
1.596425 |
| a (au) |
3.257251 |
| i (deg) |
1.731019 |
| Ω (om, deg) |
253.044065 |
| ω (w, deg) |
245.894898 |
| M (ma, deg) |
336.978031 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-06-01 00:00 |
20:38:52.53 |
-17:00:24.6 |
HIP 101879 |
4.25 |
| 2026-06-01 12:00 |
20:38:45.80 |
-17:00:38.0 |
HIP 101879 |
3.38 |
| 2026-06-02 00:00 |
20:38:38.85 |
-17:00:52.3 |
HIP 101879 |
3.17 |
| 2026-06-02 12:00 |
20:38:31.66 |
-17:01:07.4 |
HIP 101879 |
3.81 |
| 2026-06-03 00:00 |
20:38:24.25 |
-17:01:23.4 |
HIP 101879 |
5.04 |
| 2026-06-03 12:00 |
20:38:16.61 |
-17:01:40.2 |
HIP 101879 |
6.58 |
| 2026-06-04 00:00 |
20:38:08.74 |
-17:01:57.9 |
HIP 101799 |
7.17 |
| 2026-06-04 12:00 |
20:38:00.65 |
-17:02:16.4 |
HIP 101799 |
5.80 |
| 2026-06-05 00:00 |
20:37:52.33 |
-17:02:35.8 |
HIP 101799 |
4.82 |
| 2026-06-05 12:00 |
20:37:43.78 |
-17:02:56.0 |
HIP 101799 |
4.58 |
| 2026-06-06 00:00 |
20:37:35.01 |
-17:03:17.1 |
HIP 101799 |
5.25 |
| 2026-06-06 12:00 |
20:37:26.02 |
-17:03:39.0 |
HIP 101799 |
6.60 |
| 2026-06-07 00:00 |
20:37:16.80 |
-17:04:01.7 |
HIP 101799 |
8.36 |
| 2026-06-07 12:00 |
20:37:07.35 |
-17:04:25.3 |
HIP 101799 |
10.35 |
| 2026-06-08 00:00 |
20:36:57.68 |
-17:04:49.7 |
HIP 101799 |
12.50 |
| 2026-06-08 12:00 |
20:36:47.79 |
-17:05:15.0 |
HIP 101799 |
14.75 |
| 2026-06-09 00:00 |
20:36:37.68 |
-17:05:41.1 |
HIP 101799 |
17.10 |
| 2026-06-09 12:00 |
20:36:27.34 |
-17:06:08.0 |
HIP 101799 |
19.53 |
| 2026-06-10 00:00 |
20:36:16.79 |
-17:06:35.7 |
HIP 101799 |
22.02 |
| 2026-06-10 12:00 |
20:36:06.01 |
-17:07:04.2 |
HIP 101704 |
24.01 |
| 2026-06-11 00:00 |
20:35:55.02 |
-17:07:33.6 |
HIP 101704 |
25.77 |
| 2026-06-11 12:00 |
20:35:43.81 |
-17:08:03.7 |
HIP 101704 |
27.71 |
| 2026-06-12 00:00 |
20:35:32.38 |
-17:08:34.7 |
HIP 101704 |
29.82 |
| 2026-06-12 12:00 |
20:35:20.74 |
-17:09:06.4 |
HIP 101704 |
32.08 |
| 2026-06-13 00:00 |
20:35:08.88 |
-17:09:39.0 |
HIP 101704 |
34.47 |
| 2026-06-13 12:00 |
20:34:56.80 |
-17:10:12.3 |
HIP 101704 |
36.98 |
| 2026-06-14 00:00 |
20:34:44.52 |
-17:10:46.4 |
HIP 101331 |
36.92 |
| 2026-06-14 12:00 |
20:34:32.02 |
-17:11:21.3 |
HIP 101331 |
34.24 |
| 2026-06-15 00:00 |
20:34:19.32 |
-17:11:57.0 |
HIP 101331 |
31.58 |
| 2026-06-15 12:00 |
20:34:06.40 |
-17:12:33.4 |
HIP 101331 |
28.97 |
| 2026-06-16 00:00 |
20:33:53.28 |
-17:13:10.6 |
HIP 101331 |
26.44 |
| 2026-06-16 12:00 |
20:33:39.96 |
-17:13:48.5 |
HIP 101331 |
24.04 |
| 2026-06-17 00:00 |
20:33:26.43 |
-17:14:27.1 |
HIP 101331 |
21.82 |
| 2026-06-17 12:00 |
20:33:12.70 |
-17:15:06.5 |
HIP 101331 |
19.88 |
| 2026-06-18 00:00 |
20:32:58.77 |
-17:15:46.6 |
HIP 101331 |
18.34 |
| 2026-06-18 12:00 |
20:32:44.64 |
-17:16:27.4 |
HIP 101331 |
17.33 |
| 2026-06-19 00:00 |
20:32:30.32 |
-17:17:08.9 |
HIP 101331 |
16.96 |
| 2026-06-19 12:00 |
20:32:15.80 |
-17:17:51.1 |
HIP 101244 |
16.33 |
| 2026-06-20 00:00 |
20:32:01.09 |
-17:18:34.0 |
HIP 101244 |
14.14 |
| 2026-06-20 12:00 |
20:31:46.19 |
-17:19:17.6 |
HIP 101244 |
12.60 |
| 2026-06-21 00:00 |
20:31:31.10 |
-17:20:01.8 |
HIP 101244 |
11.99 |
| 2026-06-21 12:00 |
20:31:15.82 |
-17:20:46.7 |
HIP 101244 |
12.51 |
| 2026-06-22 00:00 |
20:31:00.36 |
-17:21:32.3 |
HIP 101244 |
14.05 |