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) |
| 2026-03-26 00:00 |
03:45:50.62 |
-01:37:10.9 |
HIP 17479 |
19.71 |
| 2026-03-26 12:00 |
03:45:52.35 |
-01:36:54.4 |
HIP 17479 |
19.94 |
| 2026-03-27 00:00 |
03:45:54.11 |
-01:36:37.9 |
HIP 17479 |
20.19 |
| 2026-03-27 12:00 |
03:45:55.88 |
-01:36:21.4 |
HIP 17479 |
20.46 |
| 2026-03-28 00:00 |
03:45:57.67 |
-01:36:05.0 |
HIP 17479 |
20.73 |
| 2026-03-28 12:00 |
03:45:59.48 |
-01:35:48.6 |
HIP 17479 |
21.03 |
| 2026-03-29 00:00 |
03:46:01.31 |
-01:35:32.2 |
HIP 17479 |
21.33 |
| 2026-03-29 12:00 |
03:46:03.16 |
-01:35:15.9 |
HIP 17479 |
21.65 |
| 2026-03-30 00:00 |
03:46:05.03 |
-01:34:59.6 |
HIP 17479 |
21.99 |
| 2026-03-30 12:00 |
03:46:06.92 |
-01:34:43.3 |
HIP 17479 |
22.33 |
| 2026-03-31 00:00 |
03:46:08.82 |
-01:34:27.1 |
HIP 17479 |
22.69 |
| 2026-03-31 12:00 |
03:46:10.74 |
-01:34:10.9 |
HIP 17479 |
23.06 |
| 2026-04-01 00:00 |
03:46:12.68 |
-01:33:54.8 |
HIP 17479 |
23.44 |
| 2026-04-01 12:00 |
03:46:14.64 |
-01:33:38.7 |
HIP 17479 |
23.83 |
| 2026-04-02 00:00 |
03:46:16.62 |
-01:33:22.6 |
HIP 17479 |
24.23 |
| 2026-04-02 12:00 |
03:46:18.61 |
-01:33:06.6 |
HIP 17479 |
24.65 |
| 2026-04-03 00:00 |
03:46:20.62 |
-01:32:50.7 |
HIP 17479 |
25.07 |
| 2026-04-03 12:00 |
03:46:22.65 |
-01:32:34.8 |
HIP 17479 |
25.51 |
| 2026-04-04 00:00 |
03:46:24.69 |
-01:32:18.9 |
HIP 17479 |
25.95 |
| 2026-04-04 12:00 |
03:46:26.76 |
-01:32:03.1 |
HIP 17479 |
26.40 |
| 2026-04-05 00:00 |
03:46:28.84 |
-01:31:47.3 |
HIP 17479 |
26.87 |
| 2026-04-05 12:00 |
03:46:30.93 |
-01:31:31.6 |
HIP 17479 |
27.34 |
| 2026-04-06 00:00 |
03:46:33.04 |
-01:31:15.9 |
HIP 17479 |
27.82 |
| 2026-04-06 12:00 |
03:46:35.17 |
-01:31:00.3 |
HIP 17786 |
27.45 |
| 2026-04-07 00:00 |
03:46:37.32 |
-01:30:44.8 |
HIP 17786 |
26.93 |
| 2026-04-07 12:00 |
03:46:39.48 |
-01:30:29.3 |
HIP 17786 |
26.41 |
| 2026-04-08 00:00 |
03:46:41.66 |
-01:30:13.9 |
HIP 17786 |
25.88 |
| 2026-04-08 12:00 |
03:46:43.85 |
-01:29:58.5 |
HIP 17786 |
25.36 |
| 2026-04-09 00:00 |
03:46:46.06 |
-01:29:43.2 |
HIP 17786 |
24.83 |
| 2026-04-09 12:00 |
03:46:48.28 |
-01:29:27.9 |
HIP 17786 |
24.30 |
| 2026-04-10 00:00 |
03:46:50.52 |
-01:29:12.7 |
HIP 17786 |
23.78 |
| 2026-04-10 12:00 |
03:46:52.78 |
-01:28:57.6 |
HIP 17786 |
23.25 |
| 2026-04-11 00:00 |
03:46:55.05 |
-01:28:42.5 |
HIP 17786 |
22.73 |
| 2026-04-11 12:00 |
03:46:57.33 |
-01:28:27.5 |
HIP 17786 |
22.21 |
| 2026-04-12 00:00 |
03:46:59.63 |
-01:28:12.6 |
HIP 17786 |
21.68 |
| 2026-04-12 12:00 |
03:47:01.94 |
-01:27:57.7 |
HIP 17786 |
21.16 |
| 2026-04-13 00:00 |
03:47:04.27 |
-01:27:42.9 |
HIP 17786 |
20.65 |
| 2026-04-13 12:00 |
03:47:06.61 |
-01:27:28.2 |
HIP 17786 |
20.13 |
| 2026-04-14 00:00 |
03:47:08.97 |
-01:27:13.5 |
HIP 17786 |
19.62 |
| 2026-04-14 12:00 |
03:47:11.34 |
-01:26:59.0 |
HIP 17786 |
19.11 |
| 2026-04-15 00:00 |
03:47:13.72 |
-01:26:44.5 |
HIP 17786 |
18.61 |
| 2026-04-15 12:00 |
03:47:16.12 |
-01:26:30.0 |
HIP 17786 |
18.11 |
| 2026-04-16 00:00 |
03:47:18.53 |
-01:26:15.7 |
HIP 17786 |
17.62 |