C/2007 P1 (McNaught)
메타데이터
| 항목 |
값 |
| Designation |
C/2007 P1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-04-03T06:43:48.607680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:10Z |
| Obs used |
16 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-08-10.0000000 |
| e |
1.00042564 |
| q (au) |
0.522246 |
| a (au) |
-1226.959668 |
| i (deg) |
119.181662 |
| Ω (om, deg) |
187.061353 |
| ω (w, deg) |
90.192851 |
| M (ma, deg) |
0.002952 |
밝기
산란 + 전체 선형
$$
M_a = (17.762 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.762 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
22:56:29.00 |
-72:03:25.6 |
HIP 113121 |
12.01 |
| 2026-02-03 12:00 |
22:56:36.81 |
-72:03:00.5 |
HIP 113121 |
12.74 |
| 2026-02-04 00:00 |
22:56:44.64 |
-72:02:35.7 |
HIP 113121 |
13.46 |
| 2026-02-04 12:00 |
22:56:52.51 |
-72:02:11.1 |
HIP 113121 |
14.19 |
| 2026-02-05 00:00 |
22:57:00.40 |
-72:01:46.8 |
HIP 113121 |
14.92 |
| 2026-02-05 12:00 |
22:57:08.33 |
-72:01:22.8 |
HIP 113510 |
14.98 |
| 2026-02-06 00:00 |
22:57:16.28 |
-72:00:59.1 |
HIP 113510 |
14.28 |
| 2026-02-06 12:00 |
22:57:24.26 |
-72:00:35.6 |
HIP 113510 |
13.58 |
| 2026-02-07 00:00 |
22:57:32.28 |
-72:00:12.4 |
HIP 113510 |
12.89 |
| 2026-02-07 12:00 |
22:57:40.32 |
-71:59:49.5 |
HIP 113510 |
12.20 |
| 2026-02-08 00:00 |
22:57:48.38 |
-71:59:26.9 |
HIP 113510 |
11.52 |
| 2026-02-08 12:00 |
22:57:56.48 |
-71:59:04.5 |
HIP 113510 |
10.86 |
| 2026-02-09 00:00 |
22:58:04.60 |
-71:58:42.5 |
HIP 113510 |
10.20 |
| 2026-02-09 12:00 |
22:58:12.74 |
-71:58:20.7 |
HIP 113510 |
9.55 |
| 2026-02-10 00:00 |
22:58:20.91 |
-71:57:59.1 |
HIP 113510 |
8.92 |
| 2026-02-10 12:00 |
22:58:29.11 |
-71:57:37.9 |
HIP 113510 |
8.31 |
| 2026-02-11 00:00 |
22:58:37.33 |
-71:57:17.0 |
HIP 113510 |
7.73 |
| 2026-02-11 12:00 |
22:58:45.57 |
-71:56:56.3 |
HIP 113510 |
7.17 |
| 2026-02-12 00:00 |
22:58:53.84 |
-71:56:35.9 |
HIP 113510 |
6.65 |
| 2026-02-12 12:00 |
22:59:02.13 |
-71:56:15.9 |
HIP 113510 |
6.18 |
| 2026-02-13 00:00 |
22:59:10.44 |
-71:55:56.1 |
HIP 113510 |
5.76 |
| 2026-02-13 12:00 |
22:59:18.77 |
-71:55:36.6 |
HIP 113510 |
5.42 |
| 2026-02-14 00:00 |
22:59:27.13 |
-71:55:17.4 |
HIP 113510 |
5.16 |
| 2026-02-14 12:00 |
22:59:35.50 |
-71:54:58.5 |
HIP 113510 |
4.99 |
| 2026-02-15 00:00 |
22:59:43.89 |
-71:54:39.9 |
HIP 113510 |
4.94 |
| 2026-02-15 12:00 |
22:59:52.31 |
-71:54:21.6 |
HIP 113510 |
4.99 |
| 2026-02-16 00:00 |
23:00:00.74 |
-71:54:03.6 |
HIP 113510 |
5.15 |
| 2026-02-16 12:00 |
23:00:09.19 |
-71:53:45.9 |
HIP 113510 |
5.41 |
| 2026-02-17 00:00 |
23:00:17.66 |
-71:53:28.5 |
HIP 113510 |
5.75 |
| 2026-02-17 12:00 |
23:00:26.14 |
-71:53:11.4 |
HIP 113510 |
6.16 |
| 2026-02-18 00:00 |
23:00:34.64 |
-71:52:54.7 |
HIP 113510 |
6.63 |
| 2026-02-18 12:00 |
23:00:43.16 |
-71:52:38.2 |
HIP 113510 |
7.14 |
| 2026-02-19 00:00 |
23:00:51.69 |
-71:52:22.0 |
HIP 113510 |
7.69 |
| 2026-02-19 12:00 |
23:01:00.24 |
-71:52:06.2 |
HIP 113510 |
8.27 |
| 2026-02-20 00:00 |
23:01:08.80 |
-71:51:50.6 |
HIP 113510 |
8.87 |
| 2026-02-20 12:00 |
23:01:17.37 |
-71:51:35.4 |
HIP 113510 |
9.48 |
| 2026-02-21 00:00 |
23:01:25.96 |
-71:51:20.5 |
HIP 113510 |
10.12 |
| 2026-02-21 12:00 |
23:01:34.56 |
-71:51:05.9 |
HIP 113763 |
10.49 |
| 2026-02-22 00:00 |
23:01:43.17 |
-71:50:51.6 |
HIP 113763 |
10.52 |
| 2026-02-22 12:00 |
23:01:51.79 |
-71:50:37.6 |
HIP 113763 |
10.60 |
| 2026-02-23 00:00 |
23:02:00.43 |
-71:50:23.9 |
HIP 113763 |
10.71 |
| 2026-02-23 12:00 |
23:02:09.07 |
-71:50:10.6 |
HIP 113763 |
10.87 |
| 2026-02-24 00:00 |
23:02:17.72 |
-71:49:57.6 |
HIP 113763 |
11.06 |