메타데이터
| 항목 |
값 |
| Designation |
C/2011 Q2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-01-19T18:55:25.829760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:55Z |
| Obs used |
106 |
| NEO |
- |
| M1 |
4.700 |
| K1 |
23.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-09-16.0000000 |
| e |
1.00007496 |
| q (au) |
1.349561 |
| a (au) |
-18003.301883 |
| i (deg) |
36.866576 |
| Ω (om, deg) |
287.369526 |
| ω (w, deg) |
34.628570 |
| M (ma, deg) |
-0.000051 |
밝기
산란 + 전체 선형
$$
M_a = (10.734 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.734 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
07:53:57.59 |
+13:57:53.3 |
HIP 38597 |
23.18 |
| 2026-09-20 12:00 |
07:53:59.43 |
+13:57:40.7 |
HIP 38597 |
22.92 |
| 2026-09-21 00:00 |
07:54:01.25 |
+13:57:28.3 |
HIP 38597 |
22.66 |
| 2026-09-21 12:00 |
07:54:03.04 |
+13:57:15.8 |
HIP 38597 |
22.41 |
| 2026-09-22 00:00 |
07:54:04.81 |
+13:57:03.4 |
HIP 38597 |
22.17 |
| 2026-09-22 12:00 |
07:54:06.55 |
+13:56:51.1 |
HIP 38597 |
21.94 |
| 2026-09-23 00:00 |
07:54:08.26 |
+13:56:38.8 |
HIP 38597 |
21.71 |
| 2026-09-23 12:00 |
07:54:09.94 |
+13:56:26.5 |
HIP 38597 |
21.50 |
| 2026-09-24 00:00 |
07:54:11.60 |
+13:56:14.3 |
HIP 38597 |
21.29 |
| 2026-09-24 12:00 |
07:54:13.22 |
+13:56:02.2 |
HIP 38597 |
21.09 |
| 2026-09-25 00:00 |
07:54:14.82 |
+13:55:50.1 |
HIP 38597 |
20.90 |
| 2026-09-25 12:00 |
07:54:16.40 |
+13:55:38.0 |
HIP 38597 |
20.72 |
| 2026-09-26 00:00 |
07:54:17.94 |
+13:55:26.0 |
HIP 38597 |
20.55 |
| 2026-09-26 12:00 |
07:54:19.46 |
+13:55:14.1 |
HIP 38597 |
20.38 |
| 2026-09-27 00:00 |
07:54:20.95 |
+13:55:02.2 |
HIP 38597 |
20.22 |
| 2026-09-27 12:00 |
07:54:22.41 |
+13:54:50.3 |
HIP 38597 |
20.07 |
| 2026-09-28 00:00 |
07:54:23.84 |
+13:54:38.6 |
HIP 38597 |
19.92 |
| 2026-09-28 12:00 |
07:54:25.25 |
+13:54:26.8 |
HIP 38597 |
19.79 |
| 2026-09-29 00:00 |
07:54:26.62 |
+13:54:15.2 |
HIP 38597 |
19.65 |
| 2026-09-29 12:00 |
07:54:27.97 |
+13:54:03.5 |
HIP 38597 |
19.53 |
| 2026-09-30 00:00 |
07:54:29.29 |
+13:53:52.0 |
HIP 38597 |
19.41 |
| 2026-09-30 12:00 |
07:54:30.58 |
+13:53:40.5 |
HIP 38597 |
19.29 |
| 2026-10-01 00:00 |
07:54:31.84 |
+13:53:29.0 |
HIP 38597 |
19.19 |
| 2026-10-01 12:00 |
07:54:33.07 |
+13:53:17.6 |
HIP 38597 |
19.08 |
| 2026-10-02 00:00 |
07:54:34.27 |
+13:53:06.3 |
HIP 38597 |
18.99 |
| 2026-10-02 12:00 |
07:54:35.45 |
+13:52:55.0 |
HIP 38597 |
18.89 |
| 2026-10-03 00:00 |
07:54:36.59 |
+13:52:43.8 |
HIP 38597 |
18.80 |
| 2026-10-03 12:00 |
07:54:37.71 |
+13:52:32.7 |
HIP 38597 |
18.72 |
| 2026-10-04 00:00 |
07:54:38.79 |
+13:52:21.6 |
HIP 38597 |
18.64 |
| 2026-10-04 12:00 |
07:54:39.84 |
+13:52:10.6 |
HIP 38597 |
18.56 |
| 2026-10-05 00:00 |
07:54:40.87 |
+13:51:59.7 |
HIP 38597 |
18.48 |
| 2026-10-05 12:00 |
07:54:41.86 |
+13:51:48.8 |
HIP 38597 |
18.41 |
| 2026-10-06 00:00 |
07:54:42.83 |
+13:51:38.0 |
HIP 38597 |
18.34 |
| 2026-10-06 12:00 |
07:54:43.76 |
+13:51:27.2 |
HIP 38597 |
18.28 |
| 2026-10-07 00:00 |
07:54:44.66 |
+13:51:16.5 |
HIP 38597 |
18.21 |
| 2026-10-07 12:00 |
07:54:45.54 |
+13:51:05.9 |
HIP 38597 |
18.15 |
| 2026-10-08 00:00 |
07:54:46.38 |
+13:50:55.4 |
HIP 38597 |
18.09 |
| 2026-10-08 12:00 |
07:54:47.19 |
+13:50:44.9 |
HIP 38597 |
18.03 |
| 2026-10-09 00:00 |
07:54:47.97 |
+13:50:34.5 |
HIP 38597 |
17.97 |
| 2026-10-09 12:00 |
07:54:48.72 |
+13:50:24.2 |
HIP 38597 |
17.91 |
| 2026-10-10 00:00 |
07:54:49.44 |
+13:50:13.9 |
HIP 38597 |
17.86 |
| 2026-10-10 12:00 |
07:54:50.13 |
+13:50:03.8 |
HIP 38597 |
17.80 |
| 2026-10-11 00:00 |
07:54:50.79 |
+13:49:53.6 |
HIP 38597 |
17.74 |