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) |
| 2026-06-01 00:00 |
03:51:31.88 |
-01:11:49.5 |
HIP 18104 |
9.65 |
| 2026-06-01 12:00 |
03:51:34.70 |
-01:11:46.1 |
HIP 18104 |
8.96 |
| 2026-06-02 00:00 |
03:51:37.51 |
-01:11:42.8 |
HIP 18104 |
8.28 |
| 2026-06-02 12:00 |
03:51:40.33 |
-01:11:39.7 |
HIP 18104 |
7.60 |
| 2026-06-03 00:00 |
03:51:43.13 |
-01:11:36.8 |
HIP 18104 |
6.93 |
| 2026-06-03 12:00 |
03:51:45.94 |
-01:11:33.9 |
HIP 18104 |
6.27 |
| 2026-06-04 00:00 |
03:51:48.73 |
-01:11:31.3 |
HIP 18104 |
5.62 |
| 2026-06-04 12:00 |
03:51:51.53 |
-01:11:28.7 |
HIP 18104 |
4.99 |
| 2026-06-05 00:00 |
03:51:54.31 |
-01:11:26.4 |
HIP 18104 |
4.38 |
| 2026-06-05 12:00 |
03:51:57.09 |
-01:11:24.1 |
HIP 18105 |
3.76 |
| 2026-06-06 00:00 |
03:51:59.87 |
-01:11:22.1 |
HIP 18105 |
3.09 |
| 2026-06-06 12:00 |
03:52:02.64 |
-01:11:20.1 |
HIP 18105 |
2.43 |
| 2026-06-07 00:00 |
03:52:05.40 |
-01:11:18.4 |
HIP 18105 |
1.80 |
| 2026-06-07 12:00 |
03:52:08.16 |
-01:11:16.7 |
HIP 18105 |
1.25 |
| 2026-06-08 00:00 |
03:52:10.91 |
-01:11:15.2 |
HIP 18105 |
0.90 |
| 2026-06-08 12:00 |
03:52:13.65 |
-01:11:13.9 |
HIP 18105 |
1.01 |
| 2026-06-09 00:00 |
03:52:16.39 |
-01:11:12.7 |
HIP 18105 |
1.47 |
| 2026-06-09 12:00 |
03:52:19.12 |
-01:11:11.7 |
HIP 18105 |
2.06 |
| 2026-06-10 00:00 |
03:52:21.84 |
-01:11:10.8 |
HIP 18105 |
2.69 |
| 2026-06-10 12:00 |
03:52:24.56 |
-01:11:10.1 |
HIP 18105 |
3.34 |
| 2026-06-11 00:00 |
03:52:27.27 |
-01:11:09.5 |
HIP 18105 |
4.00 |
| 2026-06-11 12:00 |
03:52:29.97 |
-01:11:09.1 |
HIP 18105 |
4.67 |
| 2026-06-12 00:00 |
03:52:32.66 |
-01:11:08.9 |
HIP 18105 |
5.33 |
| 2026-06-12 12:00 |
03:52:35.34 |
-01:11:08.7 |
HIP 18105 |
5.99 |
| 2026-06-13 00:00 |
03:52:38.02 |
-01:11:08.8 |
HIP 18105 |
6.66 |
| 2026-06-13 12:00 |
03:52:40.68 |
-01:11:09.0 |
HIP 18105 |
7.32 |
| 2026-06-14 00:00 |
03:52:43.34 |
-01:11:09.3 |
HIP 18105 |
7.98 |
| 2026-06-14 12:00 |
03:52:45.99 |
-01:11:09.8 |
HIP 18105 |
8.64 |
| 2026-06-15 00:00 |
03:52:48.63 |
-01:11:10.5 |
HIP 18105 |
9.30 |
| 2026-06-15 12:00 |
03:52:51.26 |
-01:11:11.3 |
HIP 18105 |
9.96 |
| 2026-06-16 00:00 |
03:52:53.88 |
-01:11:12.2 |
HIP 18105 |
10.61 |
| 2026-06-16 12:00 |
03:52:56.49 |
-01:11:13.4 |
HIP 18105 |
11.26 |
| 2026-06-17 00:00 |
03:52:59.09 |
-01:11:14.6 |
HIP 18105 |
11.91 |
| 2026-06-17 12:00 |
03:53:01.68 |
-01:11:16.1 |
HIP 18105 |
12.56 |
| 2026-06-18 00:00 |
03:53:04.27 |
-01:11:17.6 |
HIP 18105 |
13.20 |
| 2026-06-18 12:00 |
03:53:06.84 |
-01:11:19.4 |
HIP 18105 |
13.85 |
| 2026-06-19 00:00 |
03:53:09.39 |
-01:11:21.3 |
HIP 18105 |
14.49 |
| 2026-06-19 12:00 |
03:53:11.94 |
-01:11:23.3 |
HIP 18105 |
15.13 |
| 2026-06-20 00:00 |
03:53:14.48 |
-01:11:25.5 |
HIP 18105 |
15.76 |
| 2026-06-20 12:00 |
03:53:17.01 |
-01:11:27.9 |
HIP 18105 |
16.39 |
| 2026-06-21 00:00 |
03:53:19.52 |
-01:11:30.4 |
HIP 18105 |
17.02 |
| 2026-06-21 12:00 |
03:53:22.03 |
-01:11:33.0 |
HIP 18105 |
17.65 |
| 2026-06-22 00:00 |
03:53:24.52 |
-01:11:35.9 |
HIP 18105 |
18.28 |