메타데이터
| 항목 |
값 |
| Designation |
C/2011 L2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-11-01T06:33:18.060480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:51Z |
| Obs used |
57 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
13.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-09-08.0000000 |
| e |
1.00177257 |
| q (au) |
1.943449 |
| a (au) |
-1096.399619 |
| i (deg) |
104.257426 |
| Ω (om, deg) |
131.347725 |
| ω (w, deg) |
257.028128 |
| M (ma, deg) |
-0.001473 |
밝기
산란 + 전체 선형
$$
M_a = (18.228 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.228 |
| n |
2.000 |
| gf |
1.000 |
| 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) |
| 2026-07-29 00:00 |
09:04:46.23 |
+64:28:02.1 |
HIP 44666 |
20.72 |
| 2026-07-29 12:00 |
09:04:54.12 |
+64:27:50.3 |
HIP 44666 |
20.55 |
| 2026-07-30 00:00 |
09:05:02.02 |
+64:27:38.8 |
HIP 44666 |
20.42 |
| 2026-07-30 12:00 |
09:05:09.93 |
+64:27:27.6 |
HIP 44666 |
20.32 |
| 2026-07-31 00:00 |
09:05:17.84 |
+64:27:16.6 |
HIP 44844 |
19.82 |
| 2026-07-31 12:00 |
09:05:25.76 |
+64:27:06.0 |
HIP 44844 |
19.07 |
| 2026-08-01 00:00 |
09:05:33.68 |
+64:26:55.6 |
HIP 44844 |
18.33 |
| 2026-08-01 12:00 |
09:05:41.60 |
+64:26:45.6 |
HIP 44844 |
17.60 |
| 2026-08-02 00:00 |
09:05:49.53 |
+64:26:35.9 |
HIP 44844 |
16.88 |
| 2026-08-02 12:00 |
09:05:57.47 |
+64:26:26.4 |
HIP 44844 |
16.18 |
| 2026-08-03 00:00 |
09:06:05.41 |
+64:26:17.3 |
HIP 44844 |
15.48 |
| 2026-08-03 12:00 |
09:06:13.35 |
+64:26:08.4 |
HIP 44844 |
14.80 |
| 2026-08-04 00:00 |
09:06:21.29 |
+64:25:59.9 |
HIP 44844 |
14.14 |
| 2026-08-04 12:00 |
09:06:29.23 |
+64:25:51.7 |
HIP 44844 |
13.50 |
| 2026-08-05 00:00 |
09:06:37.18 |
+64:25:43.7 |
HIP 44844 |
12.88 |
| 2026-08-05 12:00 |
09:06:45.13 |
+64:25:36.1 |
HIP 44844 |
12.29 |
| 2026-08-06 00:00 |
09:06:53.08 |
+64:25:28.8 |
HIP 44844 |
11.73 |
| 2026-08-06 12:00 |
09:07:01.02 |
+64:25:21.8 |
HIP 44844 |
11.21 |
| 2026-08-07 00:00 |
09:07:08.97 |
+64:25:15.1 |
HIP 44844 |
10.72 |
| 2026-08-07 12:00 |
09:07:16.92 |
+64:25:08.7 |
HIP 44844 |
10.28 |
| 2026-08-08 00:00 |
09:07:24.87 |
+64:25:02.6 |
HIP 44844 |
9.89 |
| 2026-08-08 12:00 |
09:07:32.81 |
+64:24:56.8 |
HIP 44844 |
9.56 |
| 2026-08-09 00:00 |
09:07:40.76 |
+64:24:51.4 |
HIP 44844 |
9.29 |
| 2026-08-09 12:00 |
09:07:48.70 |
+64:24:46.2 |
HIP 44844 |
9.09 |
| 2026-08-10 00:00 |
09:07:56.64 |
+64:24:41.4 |
HIP 44844 |
8.96 |
| 2026-08-10 12:00 |
09:08:04.57 |
+64:24:36.9 |
HIP 44844 |
8.91 |
| 2026-08-11 00:00 |
09:08:12.50 |
+64:24:32.7 |
HIP 44844 |
8.93 |
| 2026-08-11 12:00 |
09:08:20.43 |
+64:24:28.8 |
HIP 44844 |
9.04 |
| 2026-08-12 00:00 |
09:08:28.35 |
+64:24:25.2 |
HIP 44844 |
9.21 |
| 2026-08-12 12:00 |
09:08:36.27 |
+64:24:22.0 |
HIP 44844 |
9.46 |
| 2026-08-13 00:00 |
09:08:44.18 |
+64:24:19.0 |
HIP 44844 |
9.76 |
| 2026-08-13 12:00 |
09:08:52.08 |
+64:24:16.4 |
HIP 44844 |
10.13 |
| 2026-08-14 00:00 |
09:08:59.98 |
+64:24:14.2 |
HIP 44844 |
10.55 |
| 2026-08-14 12:00 |
09:09:07.87 |
+64:24:12.2 |
HIP 44844 |
11.01 |
| 2026-08-15 00:00 |
09:09:15.75 |
+64:24:10.5 |
HIP 44844 |
11.51 |
| 2026-08-15 12:00 |
09:09:23.62 |
+64:24:09.2 |
HIP 44844 |
12.05 |
| 2026-08-16 00:00 |
09:09:31.48 |
+64:24:08.2 |
HIP 44844 |
12.61 |
| 2026-08-16 12:00 |
09:09:39.34 |
+64:24:07.6 |
HIP 44844 |
13.20 |
| 2026-08-17 00:00 |
09:09:47.18 |
+64:24:07.2 |
HIP 44844 |
13.82 |
| 2026-08-17 12:00 |
09:09:55.02 |
+64:24:07.2 |
HIP 44844 |
14.45 |
| 2026-08-18 00:00 |
09:10:02.84 |
+64:24:07.5 |
HIP 44844 |
15.10 |
| 2026-08-18 12:00 |
09:10:10.66 |
+64:24:08.1 |
HIP 44844 |
15.76 |
| 2026-08-19 00:00 |
09:10:18.46 |
+64:24:09.0 |
HIP 44844 |
16.44 |