메타데이터
| 항목 |
값 |
| Designation |
C/2011 N2 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-10-18T17:49:39.725760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:53Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
21.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-07-25.0000000 |
| e |
0.99970333 |
| q (au) |
2.563360 |
| a (au) |
8640.435892 |
| i (deg) |
33.675025 |
| Ω (om, deg) |
274.019032 |
| ω (w, deg) |
357.041413 |
| M (ma, deg) |
359.999895 |
밝기
산란 + 전체 선형
$$
M_a = (8.856 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.856 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.747 |
| 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 |
03:52:59.64 |
+39:53:34.5 |
HIP 18090 |
12.80 |
| 2026-09-20 12:00 |
03:52:57.74 |
+39:53:45.0 |
HIP 18090 |
12.56 |
| 2026-09-21 00:00 |
03:52:55.79 |
+39:53:55.3 |
HIP 18090 |
12.31 |
| 2026-09-21 12:00 |
03:52:53.81 |
+39:54:05.4 |
HIP 18090 |
12.08 |
| 2026-09-22 00:00 |
03:52:51.80 |
+39:54:15.4 |
HIP 18090 |
11.84 |
| 2026-09-22 12:00 |
03:52:49.74 |
+39:54:25.2 |
HIP 18090 |
11.60 |
| 2026-09-23 00:00 |
03:52:47.65 |
+39:54:34.9 |
HIP 18090 |
11.37 |
| 2026-09-23 12:00 |
03:52:45.52 |
+39:54:44.4 |
HIP 18090 |
11.15 |
| 2026-09-24 00:00 |
03:52:43.36 |
+39:54:53.7 |
HIP 18090 |
10.93 |
| 2026-09-24 12:00 |
03:52:41.16 |
+39:55:02.9 |
HIP 18090 |
10.72 |
| 2026-09-25 00:00 |
03:52:38.92 |
+39:55:11.9 |
HIP 18090 |
10.51 |
| 2026-09-25 12:00 |
03:52:36.65 |
+39:55:20.8 |
HIP 18090 |
10.32 |
| 2026-09-26 00:00 |
03:52:34.34 |
+39:55:29.4 |
HIP 18090 |
10.13 |
| 2026-09-26 12:00 |
03:52:32.00 |
+39:55:37.9 |
HIP 18090 |
9.96 |
| 2026-09-27 00:00 |
03:52:29.62 |
+39:55:46.3 |
HIP 18090 |
9.80 |
| 2026-09-27 12:00 |
03:52:27.20 |
+39:55:54.5 |
HIP 18090 |
9.66 |
| 2026-09-28 00:00 |
03:52:24.75 |
+39:56:02.5 |
HIP 18090 |
9.53 |
| 2026-09-28 12:00 |
03:52:22.27 |
+39:56:10.3 |
HIP 18090 |
9.42 |
| 2026-09-29 00:00 |
03:52:19.75 |
+39:56:17.9 |
HIP 18090 |
9.33 |
| 2026-09-29 12:00 |
03:52:17.19 |
+39:56:25.4 |
HIP 18090 |
9.26 |
| 2026-09-30 00:00 |
03:52:14.60 |
+39:56:32.7 |
HIP 18090 |
9.22 |
| 2026-09-30 12:00 |
03:52:11.98 |
+39:56:39.9 |
HIP 18090 |
9.19 |
| 2026-10-01 00:00 |
03:52:09.32 |
+39:56:46.8 |
HIP 18090 |
9.20 |
| 2026-10-01 12:00 |
03:52:06.63 |
+39:56:53.6 |
HIP 18090 |
9.22 |
| 2026-10-02 00:00 |
03:52:03.91 |
+39:57:00.2 |
HIP 18090 |
9.28 |
| 2026-10-02 12:00 |
03:52:01.15 |
+39:57:06.6 |
HIP 18090 |
9.36 |
| 2026-10-03 00:00 |
03:51:58.36 |
+39:57:12.8 |
HIP 18090 |
9.47 |
| 2026-10-03 12:00 |
03:51:55.53 |
+39:57:18.9 |
HIP 18090 |
9.61 |
| 2026-10-04 00:00 |
03:51:52.67 |
+39:57:24.7 |
HIP 18090 |
9.77 |
| 2026-10-04 12:00 |
03:51:49.78 |
+39:57:30.4 |
HIP 18090 |
9.96 |
| 2026-10-05 00:00 |
03:51:46.86 |
+39:57:35.9 |
HIP 18090 |
10.18 |
| 2026-10-05 12:00 |
03:51:43.90 |
+39:57:41.2 |
HIP 18090 |
10.42 |
| 2026-10-06 00:00 |
03:51:40.91 |
+39:57:46.4 |
HIP 18090 |
10.69 |
| 2026-10-06 12:00 |
03:51:37.89 |
+39:57:51.3 |
HIP 18090 |
10.98 |
| 2026-10-07 00:00 |
03:51:34.84 |
+39:57:56.1 |
HIP 18090 |
11.29 |
| 2026-10-07 12:00 |
03:51:31.75 |
+39:58:00.6 |
HIP 18090 |
11.63 |
| 2026-10-08 00:00 |
03:51:28.64 |
+39:58:05.0 |
HIP 18090 |
11.98 |
| 2026-10-08 12:00 |
03:51:25.49 |
+39:58:09.2 |
HIP 18090 |
12.36 |
| 2026-10-09 00:00 |
03:51:22.31 |
+39:58:13.2 |
HIP 18090 |
12.75 |
| 2026-10-09 12:00 |
03:51:19.11 |
+39:58:17.0 |
HIP 18090 |
13.17 |
| 2026-10-10 00:00 |
03:51:15.87 |
+39:58:20.6 |
HIP 18090 |
13.59 |
| 2026-10-10 12:00 |
03:51:12.60 |
+39:58:24.0 |
HIP 18090 |
14.04 |
| 2026-10-11 00:00 |
03:51:09.30 |
+39:58:27.2 |
HIP 18090 |
14.50 |