메타데이터
| 항목 |
값 |
| Designation |
C/2012 C2 (Bruenjes) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-03-12T15:24:12.444480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:02Z |
| Obs used |
245 |
| NEO |
- |
| M1 |
16.600 |
| K1 |
37.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-02-17.0000000 |
| e |
1.00307783 |
| q (au) |
0.802314 |
| a (au) |
-260.675176 |
| i (deg) |
162.789231 |
| Ω (om, deg) |
117.996689 |
| ω (w, deg) |
62.658603 |
| M (ma, deg) |
-0.005771 |
밝기
산란 + 전체 선형
$$
M_a = (16.388 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.388 |
| 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) |
| 2026-06-01 00:00 |
16:50:17.96 |
-34:48:37.9 |
HIP 82300 |
16.77 |
| 2026-06-01 12:00 |
16:50:13.33 |
-34:48:32.4 |
HIP 82300 |
15.86 |
| 2026-06-02 00:00 |
16:50:08.71 |
-34:48:26.8 |
HIP 82300 |
14.95 |
| 2026-06-02 12:00 |
16:50:04.08 |
-34:48:21.1 |
HIP 82300 |
14.06 |
| 2026-06-03 00:00 |
16:49:59.45 |
-34:48:15.3 |
HIP 82300 |
13.17 |
| 2026-06-03 12:00 |
16:49:54.81 |
-34:48:09.3 |
HIP 82300 |
12.29 |
| 2026-06-04 00:00 |
16:49:50.18 |
-34:48:03.3 |
HIP 82300 |
11.43 |
| 2026-06-04 12:00 |
16:49:45.55 |
-34:47:57.1 |
HIP 82300 |
10.58 |
| 2026-06-05 00:00 |
16:49:40.92 |
-34:47:50.9 |
HIP 82300 |
9.76 |
| 2026-06-05 12:00 |
16:49:36.29 |
-34:47:44.5 |
HIP 82300 |
8.96 |
| 2026-06-06 00:00 |
16:49:31.66 |
-34:47:38.0 |
HIP 82300 |
8.19 |
| 2026-06-06 12:00 |
16:49:27.03 |
-34:47:31.4 |
HIP 82300 |
7.47 |
| 2026-06-07 00:00 |
16:49:22.41 |
-34:47:24.7 |
HIP 82300 |
6.81 |
| 2026-06-07 12:00 |
16:49:17.78 |
-34:47:17.9 |
HIP 82300 |
6.23 |
| 2026-06-08 00:00 |
16:49:13.16 |
-34:47:11.0 |
HIP 82300 |
5.75 |
| 2026-06-08 12:00 |
16:49:08.54 |
-34:47:03.9 |
HIP 82300 |
5.41 |
| 2026-06-09 00:00 |
16:49:03.93 |
-34:46:56.8 |
HIP 82300 |
5.21 |
| 2026-06-09 12:00 |
16:48:59.31 |
-34:46:49.6 |
HIP 82300 |
5.20 |
| 2026-06-10 00:00 |
16:48:54.71 |
-34:46:42.2 |
HIP 82300 |
5.35 |
| 2026-06-10 12:00 |
16:48:50.10 |
-34:46:34.8 |
HIP 82300 |
5.67 |
| 2026-06-11 00:00 |
16:48:45.50 |
-34:46:27.2 |
HIP 82300 |
6.12 |
| 2026-06-11 12:00 |
16:48:40.91 |
-34:46:19.6 |
HIP 82300 |
6.68 |
| 2026-06-12 00:00 |
16:48:36.32 |
-34:46:11.8 |
HIP 82300 |
7.32 |
| 2026-06-12 12:00 |
16:48:31.73 |
-34:46:03.9 |
HIP 82300 |
8.02 |
| 2026-06-13 00:00 |
16:48:27.16 |
-34:45:56.0 |
HIP 82300 |
8.77 |
| 2026-06-13 12:00 |
16:48:22.58 |
-34:45:47.9 |
HIP 82300 |
9.55 |
| 2026-06-14 00:00 |
16:48:18.02 |
-34:45:39.8 |
HIP 82300 |
10.37 |
| 2026-06-14 12:00 |
16:48:13.46 |
-34:45:31.5 |
HIP 82300 |
11.20 |
| 2026-06-15 00:00 |
16:48:08.91 |
-34:45:23.1 |
HIP 82300 |
12.05 |
| 2026-06-15 12:00 |
16:48:04.37 |
-34:45:14.7 |
HIP 82300 |
12.91 |
| 2026-06-16 00:00 |
16:47:59.84 |
-34:45:06.1 |
HIP 82300 |
13.78 |
| 2026-06-16 12:00 |
16:47:55.31 |
-34:44:57.5 |
HIP 82300 |
14.66 |
| 2026-06-17 00:00 |
16:47:50.80 |
-34:44:48.7 |
HIP 82300 |
15.55 |
| 2026-06-17 12:00 |
16:47:46.29 |
-34:44:39.9 |
HIP 82300 |
16.44 |
| 2026-06-18 00:00 |
16:47:41.79 |
-34:44:31.0 |
HIP 82300 |
17.34 |
| 2026-06-18 12:00 |
16:47:37.30 |
-34:44:21.9 |
HIP 82300 |
18.23 |
| 2026-06-19 00:00 |
16:47:32.83 |
-34:44:12.8 |
HIP 82300 |
19.13 |
| 2026-06-19 12:00 |
16:47:28.36 |
-34:44:03.6 |
HIP 82300 |
20.03 |
| 2026-06-20 00:00 |
16:47:23.91 |
-34:43:54.3 |
HIP 82300 |
20.94 |
| 2026-06-20 12:00 |
16:47:19.46 |
-34:43:44.9 |
HIP 82300 |
21.84 |
| 2026-06-21 00:00 |
16:47:15.03 |
-34:43:35.4 |
HIP 82300 |
22.74 |
| 2026-06-21 12:00 |
16:47:10.61 |
-34:43:25.9 |
HIP 82033 |
22.20 |
| 2026-06-22 00:00 |
16:47:06.20 |
-34:43:16.2 |
HIP 82033 |
21.29 |