메타데이터
| 항목 |
값 |
| Designation |
C/2009 W2 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-05-01T16:06:03.297600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:37Z |
| Obs used |
93 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-12-12.0000000 |
| e |
0.99955388 |
| q (au) |
6.907134 |
| a (au) |
15482.794125 |
| i (deg) |
164.490524 |
| Ω (om, deg) |
199.580074 |
| ω (w, deg) |
121.325958 |
| M (ma, deg) |
359.999928 |
밝기
산란 + 전체 선형
$$
M_a = (6.856 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.856 |
| n |
6.000 |
| gf |
0.991 |
| gb |
-0.810 |
| k |
0.831 |
| δ90 |
7.006 |
| 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 |
21:33:04.73 |
-29:50:03.1 |
HIP 106486 |
20.30 |
| 2026-07-29 12:00 |
21:33:00.05 |
-29:50:27.8 |
HIP 106486 |
20.67 |
| 2026-07-30 00:00 |
21:32:55.37 |
-29:50:52.3 |
HIP 106486 |
21.09 |
| 2026-07-30 12:00 |
21:32:50.68 |
-29:51:16.7 |
HIP 106486 |
21.56 |
| 2026-07-31 00:00 |
21:32:45.98 |
-29:51:41.1 |
HIP 106486 |
22.08 |
| 2026-07-31 12:00 |
21:32:41.27 |
-29:52:05.3 |
HIP 106486 |
22.64 |
| 2026-08-01 00:00 |
21:32:36.55 |
-29:52:29.4 |
HIP 106486 |
23.24 |
| 2026-08-01 12:00 |
21:32:31.83 |
-29:52:53.4 |
HIP 106486 |
23.88 |
| 2026-08-02 00:00 |
21:32:27.09 |
-29:53:17.3 |
HIP 106486 |
24.56 |
| 2026-08-02 12:00 |
21:32:22.35 |
-29:53:41.1 |
HIP 106486 |
25.26 |
| 2026-08-03 00:00 |
21:32:17.60 |
-29:54:04.8 |
HIP 106486 |
26.00 |
| 2026-08-03 12:00 |
21:32:12.85 |
-29:54:28.4 |
HIP 106486 |
26.76 |
| 2026-08-04 00:00 |
21:32:08.08 |
-29:54:51.8 |
HIP 106486 |
27.55 |
| 2026-08-04 12:00 |
21:32:03.32 |
-29:55:15.2 |
HIP 106486 |
28.36 |
| 2026-08-05 00:00 |
21:31:58.54 |
-29:55:38.4 |
HIP 106149 |
27.27 |
| 2026-08-05 12:00 |
21:31:53.76 |
-29:56:01.5 |
HIP 106149 |
26.17 |
| 2026-08-06 00:00 |
21:31:48.98 |
-29:56:24.4 |
HIP 106149 |
25.07 |
| 2026-08-06 12:00 |
21:31:44.18 |
-29:56:47.3 |
HIP 106149 |
23.97 |
| 2026-08-07 00:00 |
21:31:39.39 |
-29:57:10.0 |
HIP 106149 |
22.87 |
| 2026-08-07 12:00 |
21:31:34.59 |
-29:57:32.6 |
HIP 106149 |
21.77 |
| 2026-08-08 00:00 |
21:31:29.79 |
-29:57:55.1 |
HIP 106149 |
20.67 |
| 2026-08-08 12:00 |
21:31:24.98 |
-29:58:17.4 |
HIP 106149 |
19.57 |
| 2026-08-09 00:00 |
21:31:20.17 |
-29:58:39.6 |
HIP 106149 |
18.48 |
| 2026-08-09 12:00 |
21:31:15.36 |
-29:59:01.7 |
HIP 106149 |
17.39 |
| 2026-08-10 00:00 |
21:31:10.54 |
-29:59:23.6 |
HIP 106149 |
16.29 |
| 2026-08-10 12:00 |
21:31:05.72 |
-29:59:45.4 |
HIP 106149 |
15.21 |
| 2026-08-11 00:00 |
21:31:00.90 |
-30:00:07.1 |
HIP 106149 |
14.12 |
| 2026-08-11 12:00 |
21:30:56.08 |
-30:00:28.6 |
HIP 106149 |
13.04 |
| 2026-08-12 00:00 |
21:30:51.26 |
-30:00:50.0 |
HIP 106149 |
11.96 |
| 2026-08-12 12:00 |
21:30:46.44 |
-30:01:11.2 |
HIP 106149 |
10.89 |
| 2026-08-13 00:00 |
21:30:41.62 |
-30:01:32.3 |
HIP 106149 |
9.83 |
| 2026-08-13 12:00 |
21:30:36.79 |
-30:01:53.3 |
HIP 106149 |
8.78 |
| 2026-08-14 00:00 |
21:30:31.97 |
-30:02:14.1 |
HIP 106149 |
7.75 |
| 2026-08-14 12:00 |
21:30:27.15 |
-30:02:34.7 |
HIP 106149 |
6.74 |
| 2026-08-15 00:00 |
21:30:22.33 |
-30:02:55.2 |
HIP 106149 |
5.77 |
| 2026-08-15 12:00 |
21:30:17.51 |
-30:03:15.5 |
HIP 106149 |
4.85 |
| 2026-08-16 00:00 |
21:30:12.69 |
-30:03:35.7 |
HIP 106149 |
4.02 |
| 2026-08-16 12:00 |
21:30:07.88 |
-30:03:55.7 |
HIP 106149 |
3.35 |
| 2026-08-17 00:00 |
21:30:03.07 |
-30:04:15.6 |
HIP 106149 |
2.95 |
| 2026-08-17 12:00 |
21:29:58.26 |
-30:04:35.3 |
HIP 106149 |
2.92 |
| 2026-08-18 00:00 |
21:29:53.45 |
-30:04:54.9 |
HIP 106149 |
3.29 |
| 2026-08-18 12:00 |
21:29:48.65 |
-30:05:14.3 |
HIP 106149 |
3.93 |
| 2026-08-19 00:00 |
21:29:43.85 |
-30:05:33.5 |
HIP 106149 |
4.74 |