메타데이터
| 항목 |
값 |
| Designation |
C/2011 C1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-04-18T00:03:10.460160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:48Z |
| Obs used |
613 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
17.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-04-15.0000000 |
| e |
0.99743318 |
| q (au) |
0.883378 |
| a (au) |
344.152599 |
| i (deg) |
16.825617 |
| Ω (om, deg) |
192.438367 |
| ω (w, deg) |
84.473509 |
| M (ma, deg) |
359.999537 |
밝기
산란 + 전체 선형
$$
M_a = (14.233 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.233 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.772 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2011-01-14 |
2011-03-19 |
+10.0795 |
-0.697 |
| 2011-03-19 |
2011-04-17 |
+45.5485 |
-0.310 |
| 2011-04-18 |
2011-06-07 |
-12.9373 |
-3.109 |
| 2011-06-07 |
2011-08-07 |
-10.1929 |
-2.073 |
| 2011-08-07 |
2011-11-18 |
+22.7570 |
-11.124 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
05:08:38.22 |
+08:15:15.0 |
HIP 23879 |
18.46 |
| 2026-05-12 12:00 |
05:08:41.43 |
+08:15:24.9 |
HIP 23879 |
18.83 |
| 2026-05-13 00:00 |
05:08:44.65 |
+08:15:34.6 |
HIP 24031 |
18.93 |
| 2026-05-13 12:00 |
05:08:47.89 |
+08:15:44.3 |
HIP 24031 |
18.21 |
| 2026-05-14 00:00 |
05:08:51.14 |
+08:15:53.9 |
HIP 24031 |
17.49 |
| 2026-05-14 12:00 |
05:08:54.40 |
+08:16:03.4 |
HIP 24031 |
16.78 |
| 2026-05-15 00:00 |
05:08:57.67 |
+08:16:12.8 |
HIP 24031 |
16.08 |
| 2026-05-15 12:00 |
05:09:00.95 |
+08:16:22.1 |
HIP 24031 |
15.38 |
| 2026-05-16 00:00 |
05:09:04.24 |
+08:16:31.4 |
HIP 24031 |
14.70 |
| 2026-05-16 12:00 |
05:09:07.55 |
+08:16:40.5 |
HIP 24031 |
14.03 |
| 2026-05-17 00:00 |
05:09:10.86 |
+08:16:49.6 |
HIP 24031 |
13.37 |
| 2026-05-17 12:00 |
05:09:14.19 |
+08:16:58.5 |
HIP 24031 |
12.73 |
| 2026-05-18 00:00 |
05:09:17.52 |
+08:17:07.4 |
HIP 24031 |
12.11 |
| 2026-05-18 12:00 |
05:09:20.87 |
+08:17:16.2 |
HIP 24031 |
11.52 |
| 2026-05-19 00:00 |
05:09:24.22 |
+08:17:24.8 |
HIP 24031 |
10.96 |
| 2026-05-19 12:00 |
05:09:27.59 |
+08:17:33.4 |
HIP 24031 |
10.43 |
| 2026-05-20 00:00 |
05:09:30.96 |
+08:17:41.9 |
HIP 24031 |
9.94 |
| 2026-05-20 12:00 |
05:09:34.34 |
+08:17:50.3 |
HIP 24031 |
9.50 |
| 2026-05-21 00:00 |
05:09:37.73 |
+08:17:58.6 |
HIP 24031 |
9.12 |
| 2026-05-21 12:00 |
05:09:41.13 |
+08:18:06.7 |
HIP 24031 |
8.80 |
| 2026-05-22 00:00 |
05:09:44.54 |
+08:18:14.8 |
HIP 24031 |
8.55 |
| 2026-05-22 12:00 |
05:09:47.96 |
+08:18:22.8 |
HIP 24031 |
8.37 |
| 2026-05-23 00:00 |
05:09:51.38 |
+08:18:30.7 |
HIP 24031 |
8.28 |
| 2026-05-23 12:00 |
05:09:54.81 |
+08:18:38.5 |
HIP 24031 |
8.28 |
| 2026-05-24 00:00 |
05:09:58.25 |
+08:18:46.2 |
HIP 24031 |
8.37 |
| 2026-05-24 12:00 |
05:10:01.69 |
+08:18:53.8 |
HIP 24031 |
8.53 |
| 2026-05-25 00:00 |
05:10:05.14 |
+08:19:01.3 |
HIP 24031 |
8.78 |
| 2026-05-25 12:00 |
05:10:08.60 |
+08:19:08.7 |
HIP 24031 |
9.11 |
| 2026-05-26 00:00 |
05:10:12.07 |
+08:19:16.0 |
HIP 24031 |
9.50 |
| 2026-05-26 12:00 |
05:10:15.54 |
+08:19:23.2 |
HIP 24031 |
9.95 |
| 2026-05-27 00:00 |
05:10:19.02 |
+08:19:30.3 |
HIP 24031 |
10.45 |
| 2026-05-27 12:00 |
05:10:22.50 |
+08:19:37.3 |
HIP 24031 |
11.00 |
| 2026-05-28 00:00 |
05:10:25.99 |
+08:19:44.2 |
HIP 24031 |
11.58 |
| 2026-05-28 12:00 |
05:10:29.48 |
+08:19:51.0 |
HIP 24031 |
12.20 |
| 2026-05-29 00:00 |
05:10:32.98 |
+08:19:57.7 |
HIP 24031 |
12.85 |
| 2026-05-29 12:00 |
05:10:36.49 |
+08:20:04.3 |
HIP 24031 |
13.52 |
| 2026-05-30 00:00 |
05:10:39.99 |
+08:20:10.7 |
HIP 24031 |
14.22 |
| 2026-05-30 12:00 |
05:10:43.51 |
+08:20:17.1 |
HIP 24031 |
14.93 |
| 2026-05-31 00:00 |
05:10:47.03 |
+08:20:23.4 |
HIP 24031 |
15.66 |
| 2026-05-31 12:00 |
05:10:50.55 |
+08:20:29.6 |
HIP 24031 |
16.40 |
| 2026-06-01 00:00 |
05:10:54.07 |
+08:20:35.6 |
HIP 24031 |
17.16 |
| 2026-06-01 12:00 |
05:10:57.60 |
+08:20:41.6 |
HIP 24031 |
17.93 |
| 2026-06-02 00:00 |
05:11:01.13 |
+08:20:47.4 |
HIP 24031 |
18.70 |