메타데이터
| 항목 |
값 |
| Designation |
P/2009 Q5 (McNaught) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-09-08T13:50:29.091840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:34Z |
| Obs used |
331 |
| NEO |
- |
| M1 |
13.100 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-10-09.0000000 |
| e |
0.60905285 |
| q (au) |
2.918512 |
| a (au) |
7.465233 |
| i (deg) |
40.904822 |
| Ω (om, deg) |
160.139864 |
| ω (w, deg) |
209.274918 |
| M (ma, deg) |
1.470093 |
밝기
산란 + 전체 선형
$$
M_a = (12.633 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.633 |
| n |
2.000 |
| gf |
0.978 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
9.962 |
| 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) |
| 2026-05-12 00:00 |
16:00:23.84 |
+24:49:48.3 |
HIP 78278 |
23.15 |
| 2026-05-12 12:00 |
16:00:11.79 |
+24:50:55.6 |
HIP 78278 |
21.59 |
| 2026-05-13 00:00 |
15:59:59.71 |
+24:52:01.6 |
HIP 78278 |
20.33 |
| 2026-05-13 12:00 |
15:59:47.60 |
+24:53:06.1 |
HIP 78278 |
19.41 |
| 2026-05-14 00:00 |
15:59:35.45 |
+24:54:09.3 |
HIP 78278 |
18.88 |
| 2026-05-14 12:00 |
15:59:23.27 |
+24:55:11.0 |
HIP 78278 |
18.79 |
| 2026-05-15 00:00 |
15:59:11.06 |
+24:56:11.2 |
HIP 78278 |
19.13 |
| 2026-05-15 12:00 |
15:58:58.81 |
+24:57:10.1 |
HIP 78278 |
19.88 |
| 2026-05-16 00:00 |
15:58:46.55 |
+24:58:07.5 |
HIP 78278 |
21.00 |
| 2026-05-16 12:00 |
15:58:34.25 |
+24:59:03.4 |
HIP 78278 |
22.43 |
| 2026-05-17 00:00 |
15:58:21.93 |
+24:59:57.9 |
HIP 78278 |
24.12 |
| 2026-05-17 12:00 |
15:58:09.59 |
+25:00:50.9 |
HIP 78069 |
25.63 |
| 2026-05-18 00:00 |
15:57:57.23 |
+25:01:42.4 |
HIP 78069 |
22.72 |
| 2026-05-18 12:00 |
15:57:44.85 |
+25:02:32.5 |
HIP 78069 |
19.81 |
| 2026-05-19 00:00 |
15:57:32.45 |
+25:03:21.0 |
HIP 78069 |
16.92 |
| 2026-05-19 12:00 |
15:57:20.04 |
+25:04:08.1 |
HIP 78069 |
14.06 |
| 2026-05-20 00:00 |
15:57:07.61 |
+25:04:53.7 |
HIP 78069 |
11.22 |
| 2026-05-20 12:00 |
15:56:55.18 |
+25:05:37.8 |
HIP 78069 |
8.46 |
| 2026-05-21 00:00 |
15:56:42.73 |
+25:06:20.4 |
HIP 78069 |
5.85 |
| 2026-05-21 12:00 |
15:56:30.27 |
+25:07:01.5 |
HIP 78069 |
3.74 |
| 2026-05-22 00:00 |
15:56:17.81 |
+25:07:41.1 |
HIP 78069 |
3.28 |
| 2026-05-22 12:00 |
15:56:05.34 |
+25:08:19.2 |
HIP 78069 |
4.94 |
| 2026-05-23 00:00 |
15:55:52.87 |
+25:08:55.8 |
HIP 78069 |
7.41 |
| 2026-05-23 12:00 |
15:55:40.39 |
+25:09:30.9 |
HIP 78069 |
10.10 |
| 2026-05-24 00:00 |
15:55:27.92 |
+25:10:04.4 |
HIP 78069 |
12.88 |
| 2026-05-24 12:00 |
15:55:15.44 |
+25:10:36.4 |
HIP 78069 |
15.69 |
| 2026-05-25 00:00 |
15:55:02.97 |
+25:11:07.0 |
HIP 78069 |
18.52 |
| 2026-05-25 12:00 |
15:54:50.51 |
+25:11:36.0 |
HIP 78069 |
21.36 |
| 2026-05-26 00:00 |
15:54:38.05 |
+25:12:03.4 |
HIP 78069 |
24.20 |
| 2026-05-26 12:00 |
15:54:25.60 |
+25:12:29.4 |
HIP 78069 |
27.04 |
| 2026-05-27 00:00 |
15:54:13.15 |
+25:12:53.8 |
HIP 78069 |
29.87 |
| 2026-05-27 12:00 |
15:54:00.72 |
+25:13:16.7 |
HIP 78069 |
32.71 |
| 2026-05-28 00:00 |
15:53:48.30 |
+25:13:38.1 |
HIP 77676 |
31.75 |
| 2026-05-28 12:00 |
15:53:35.90 |
+25:13:58.0 |
HIP 77676 |
28.93 |
| 2026-05-29 00:00 |
15:53:23.51 |
+25:14:16.3 |
HIP 77676 |
26.11 |
| 2026-05-29 12:00 |
15:53:11.13 |
+25:14:33.1 |
HIP 77676 |
23.31 |
| 2026-05-30 00:00 |
15:52:58.78 |
+25:14:48.4 |
HIP 77676 |
20.51 |
| 2026-05-30 12:00 |
15:52:46.44 |
+25:15:02.1 |
HIP 77676 |
17.72 |
| 2026-05-31 00:00 |
15:52:34.13 |
+25:15:14.4 |
HIP 77676 |
14.95 |
| 2026-05-31 12:00 |
15:52:21.84 |
+25:15:25.1 |
HIP 77676 |
12.20 |
| 2026-06-01 00:00 |
15:52:09.57 |
+25:15:34.2 |
HIP 77676 |
9.48 |
| 2026-06-01 12:00 |
15:51:57.33 |
+25:15:41.9 |
HIP 77676 |
6.82 |
| 2026-06-02 00:00 |
15:51:45.12 |
+25:15:48.0 |
HIP 77676 |
4.33 |