메타데이터
| 항목 |
값 |
| Designation |
C/2005 W2 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-03-27T09:29:05.815680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:54Z |
| Obs used |
219 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2005-12-19.0000000 |
| e |
0.82445359 |
| q (au) |
3.331620 |
| a (au) |
18.978569 |
| i (deg) |
11.264027 |
| Ω (om, deg) |
336.615180 |
| ω (w, deg) |
111.670116 |
| M (ma, deg) |
358.827041 |
밝기
산란 + 전체 선형
$$
M_a = (7.408 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.408 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
16:20:19.92 |
-32:43:52.9 |
HIP 80080 |
22.94 |
| 2026-09-20 12:00 |
16:20:22.08 |
-32:43:46.2 |
HIP 80080 |
22.98 |
| 2026-09-21 00:00 |
16:20:24.29 |
-32:43:39.6 |
HIP 80080 |
23.03 |
| 2026-09-21 12:00 |
16:20:26.53 |
-32:43:33.1 |
HIP 80080 |
23.08 |
| 2026-09-22 00:00 |
16:20:28.81 |
-32:43:26.7 |
HIP 80080 |
23.14 |
| 2026-09-22 12:00 |
16:20:31.12 |
-32:43:20.4 |
HIP 80080 |
23.21 |
| 2026-09-23 00:00 |
16:20:33.48 |
-32:43:14.3 |
HIP 80080 |
23.28 |
| 2026-09-23 12:00 |
16:20:35.87 |
-32:43:08.3 |
HIP 80080 |
23.37 |
| 2026-09-24 00:00 |
16:20:38.29 |
-32:43:02.4 |
HIP 80080 |
23.46 |
| 2026-09-24 12:00 |
16:20:40.75 |
-32:42:56.6 |
HIP 80080 |
23.56 |
| 2026-09-25 00:00 |
16:20:43.25 |
-32:42:51.0 |
HIP 80080 |
23.67 |
| 2026-09-25 12:00 |
16:20:45.78 |
-32:42:45.4 |
HIP 80080 |
23.80 |
| 2026-09-26 00:00 |
16:20:48.35 |
-32:42:40.0 |
HIP 80080 |
23.93 |
| 2026-09-26 12:00 |
16:20:50.96 |
-32:42:34.7 |
HIP 80080 |
24.07 |
| 2026-09-27 00:00 |
16:20:53.59 |
-32:42:29.6 |
HIP 80080 |
24.22 |
| 2026-09-27 12:00 |
16:20:56.27 |
-32:42:24.5 |
HIP 80080 |
24.39 |
| 2026-09-28 00:00 |
16:20:58.98 |
-32:42:19.6 |
HIP 80080 |
24.56 |
| 2026-09-28 12:00 |
16:21:01.72 |
-32:42:14.8 |
HIP 80080 |
24.75 |
| 2026-09-29 00:00 |
16:21:04.50 |
-32:42:10.2 |
HIP 80080 |
24.95 |
| 2026-09-29 12:00 |
16:21:07.32 |
-32:42:05.6 |
HIP 80080 |
25.16 |
| 2026-09-30 00:00 |
16:21:10.17 |
-32:42:01.2 |
HIP 80080 |
25.38 |
| 2026-09-30 12:00 |
16:21:13.05 |
-32:41:56.9 |
HIP 80080 |
25.62 |
| 2026-10-01 00:00 |
16:21:15.97 |
-32:41:52.7 |
HIP 80080 |
25.86 |
| 2026-10-01 12:00 |
16:21:18.92 |
-32:41:48.6 |
HIP 80199 |
25.63 |
| 2026-10-02 00:00 |
16:21:21.90 |
-32:41:44.7 |
HIP 80199 |
25.26 |
| 2026-10-02 12:00 |
16:21:24.92 |
-32:41:40.9 |
HIP 80199 |
24.89 |
| 2026-10-03 00:00 |
16:21:27.97 |
-32:41:37.2 |
HIP 80199 |
24.53 |
| 2026-10-03 12:00 |
16:21:31.06 |
-32:41:33.7 |
HIP 80199 |
24.18 |
| 2026-10-04 00:00 |
16:21:34.17 |
-32:41:30.2 |
HIP 80199 |
23.85 |
| 2026-10-04 12:00 |
16:21:37.32 |
-32:41:26.9 |
HIP 80199 |
23.52 |
| 2026-10-05 00:00 |
16:21:40.51 |
-32:41:23.8 |
HIP 80199 |
23.21 |
| 2026-10-05 12:00 |
16:21:43.72 |
-32:41:20.7 |
HIP 80199 |
22.92 |
| 2026-10-06 00:00 |
16:21:46.97 |
-32:41:17.8 |
HIP 80199 |
22.64 |
| 2026-10-06 12:00 |
16:21:50.25 |
-32:41:15.0 |
HIP 80199 |
22.38 |
| 2026-10-07 00:00 |
16:21:53.57 |
-32:41:12.3 |
HIP 80199 |
22.14 |
| 2026-10-07 12:00 |
16:21:56.91 |
-32:41:09.7 |
HIP 80199 |
21.92 |
| 2026-10-08 00:00 |
16:22:00.29 |
-32:41:07.3 |
HIP 80199 |
21.72 |
| 2026-10-08 12:00 |
16:22:03.70 |
-32:41:05.0 |
HIP 80199 |
21.54 |
| 2026-10-09 00:00 |
16:22:07.14 |
-32:41:02.9 |
HIP 80199 |
21.39 |
| 2026-10-09 12:00 |
16:22:10.61 |
-32:41:00.8 |
HIP 80199 |
21.26 |
| 2026-10-10 00:00 |
16:22:14.11 |
-32:40:58.9 |
HIP 80199 |
21.16 |
| 2026-10-10 12:00 |
16:22:17.64 |
-32:40:57.1 |
HIP 80199 |
21.09 |
| 2026-10-11 00:00 |
16:22:21.20 |
-32:40:55.4 |
HIP 80199 |
21.04 |