메타데이터
| 항목 |
값 |
| Designation |
C/2006 L2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-11-20T04:47:09.041280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:58Z |
| Obs used |
400 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
7.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-09-29.0000000 |
| e |
1.00101694 |
| q (au) |
1.993947 |
| a (au) |
-1960.738221 |
| i (deg) |
101.022296 |
| Ω (om, deg) |
239.245982 |
| ω (w, deg) |
48.034913 |
| M (ma, deg) |
-0.000593 |
밝기
산란 + 전체 선형
$$
M_a = (9.163 + 5.317\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.163 |
| n |
5.317 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.977 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2006-06-14 |
2006-10-14 |
+7.4648 |
-3.534 |
| 2006-12-02 |
2007-11-02 |
+6.0663 |
-2.640 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
03:55:46.17 |
-01:21:59.1 |
HIP 18317 |
13.51 |
| 2026-07-29 12:00 |
03:55:47.38 |
-01:22:12.8 |
HIP 18317 |
13.89 |
| 2026-07-30 00:00 |
03:55:48.56 |
-01:22:26.6 |
HIP 18317 |
14.25 |
| 2026-07-30 12:00 |
03:55:49.72 |
-01:22:40.6 |
HIP 18317 |
14.62 |
| 2026-07-31 00:00 |
03:55:50.87 |
-01:22:54.6 |
HIP 18317 |
14.98 |
| 2026-07-31 12:00 |
03:55:51.98 |
-01:23:08.8 |
HIP 18317 |
15.34 |
| 2026-08-01 00:00 |
03:55:53.08 |
-01:23:23.2 |
HIP 18317 |
15.70 |
| 2026-08-01 12:00 |
03:55:54.16 |
-01:23:37.6 |
HIP 18317 |
16.05 |
| 2026-08-02 00:00 |
03:55:55.21 |
-01:23:52.2 |
HIP 18462 |
15.87 |
| 2026-08-02 12:00 |
03:55:56.24 |
-01:24:06.9 |
HIP 18462 |
15.52 |
| 2026-08-03 00:00 |
03:55:57.24 |
-01:24:21.7 |
HIP 18462 |
15.16 |
| 2026-08-03 12:00 |
03:55:58.23 |
-01:24:36.6 |
HIP 18462 |
14.81 |
| 2026-08-04 00:00 |
03:55:59.19 |
-01:24:51.7 |
HIP 18462 |
14.47 |
| 2026-08-04 12:00 |
03:56:00.13 |
-01:25:06.8 |
HIP 18462 |
14.13 |
| 2026-08-05 00:00 |
03:56:01.05 |
-01:25:22.1 |
HIP 18462 |
13.79 |
| 2026-08-05 12:00 |
03:56:01.94 |
-01:25:37.6 |
HIP 18462 |
13.45 |
| 2026-08-06 00:00 |
03:56:02.81 |
-01:25:53.1 |
HIP 18462 |
13.12 |
| 2026-08-06 12:00 |
03:56:03.66 |
-01:26:08.7 |
HIP 18462 |
12.79 |
| 2026-08-07 00:00 |
03:56:04.49 |
-01:26:24.5 |
HIP 18462 |
12.46 |
| 2026-08-07 12:00 |
03:56:05.29 |
-01:26:40.4 |
HIP 18462 |
12.14 |
| 2026-08-08 00:00 |
03:56:06.06 |
-01:26:56.4 |
HIP 18462 |
11.82 |
| 2026-08-08 12:00 |
03:56:06.82 |
-01:27:12.5 |
HIP 18462 |
11.50 |
| 2026-08-09 00:00 |
03:56:07.55 |
-01:27:28.7 |
HIP 18462 |
11.19 |
| 2026-08-09 12:00 |
03:56:08.26 |
-01:27:45.0 |
HIP 18462 |
10.89 |
| 2026-08-10 00:00 |
03:56:08.94 |
-01:28:01.5 |
HIP 18462 |
10.59 |
| 2026-08-10 12:00 |
03:56:09.60 |
-01:28:18.0 |
HIP 18462 |
10.29 |
| 2026-08-11 00:00 |
03:56:10.24 |
-01:28:34.7 |
HIP 18462 |
10.00 |
| 2026-08-11 12:00 |
03:56:10.85 |
-01:28:51.4 |
HIP 18462 |
9.72 |
| 2026-08-12 00:00 |
03:56:11.44 |
-01:29:08.3 |
HIP 18462 |
9.44 |
| 2026-08-12 12:00 |
03:56:12.00 |
-01:29:25.3 |
HIP 18462 |
9.17 |
| 2026-08-13 00:00 |
03:56:12.54 |
-01:29:42.4 |
HIP 18462 |
8.90 |
| 2026-08-13 12:00 |
03:56:13.06 |
-01:29:59.6 |
HIP 18462 |
8.65 |
| 2026-08-14 00:00 |
03:56:13.55 |
-01:30:16.9 |
HIP 18462 |
8.40 |
| 2026-08-14 12:00 |
03:56:14.01 |
-01:30:34.2 |
HIP 18462 |
8.16 |
| 2026-08-15 00:00 |
03:56:14.46 |
-01:30:51.7 |
HIP 18462 |
7.93 |
| 2026-08-15 12:00 |
03:56:14.87 |
-01:31:09.3 |
HIP 18462 |
7.71 |
| 2026-08-16 00:00 |
03:56:15.27 |
-01:31:27.0 |
HIP 18462 |
7.51 |
| 2026-08-16 12:00 |
03:56:15.64 |
-01:31:44.8 |
HIP 18462 |
7.31 |
| 2026-08-17 00:00 |
03:56:15.98 |
-01:32:02.7 |
HIP 18462 |
7.13 |
| 2026-08-17 12:00 |
03:56:16.30 |
-01:32:20.7 |
HIP 18462 |
6.96 |
| 2026-08-18 00:00 |
03:56:16.60 |
-01:32:38.7 |
HIP 18462 |
6.81 |
| 2026-08-18 12:00 |
03:56:16.87 |
-01:32:56.9 |
HIP 18462 |
6.68 |
| 2026-08-19 00:00 |
03:56:17.11 |
-01:33:15.2 |
HIP 18462 |
6.56 |