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) |
| 2026-06-01 00:00 |
16:27:29.74 |
-33:31:37.1 |
HIP 80486 |
21.92 |
| 2026-06-01 12:00 |
16:27:25.10 |
-33:31:27.7 |
HIP 80486 |
20.98 |
| 2026-06-02 00:00 |
16:27:20.45 |
-33:31:18.2 |
HIP 80486 |
20.04 |
| 2026-06-02 12:00 |
16:27:15.80 |
-33:31:08.6 |
HIP 80486 |
19.10 |
| 2026-06-03 00:00 |
16:27:11.16 |
-33:30:58.8 |
HIP 80486 |
18.18 |
| 2026-06-03 12:00 |
16:27:06.53 |
-33:30:49.0 |
HIP 80486 |
17.25 |
| 2026-06-04 00:00 |
16:27:01.89 |
-33:30:39.0 |
HIP 80486 |
16.34 |
| 2026-06-04 12:00 |
16:26:57.26 |
-33:30:28.9 |
HIP 80486 |
15.44 |
| 2026-06-05 00:00 |
16:26:52.64 |
-33:30:18.7 |
HIP 80486 |
14.54 |
| 2026-06-05 12:00 |
16:26:48.01 |
-33:30:08.3 |
HIP 80486 |
13.66 |
| 2026-06-06 00:00 |
16:26:43.40 |
-33:29:57.9 |
HIP 80486 |
12.80 |
| 2026-06-06 12:00 |
16:26:38.79 |
-33:29:47.3 |
HIP 80486 |
11.95 |
| 2026-06-07 00:00 |
16:26:34.18 |
-33:29:36.7 |
HIP 80486 |
11.13 |
| 2026-06-07 12:00 |
16:26:29.59 |
-33:29:25.9 |
HIP 80486 |
10.33 |
| 2026-06-08 00:00 |
16:26:24.99 |
-33:29:15.0 |
HIP 80486 |
9.57 |
| 2026-06-08 12:00 |
16:26:20.41 |
-33:29:04.1 |
HIP 80486 |
8.86 |
| 2026-06-09 00:00 |
16:26:15.83 |
-33:28:53.0 |
HIP 80486 |
8.20 |
| 2026-06-09 12:00 |
16:26:11.26 |
-33:28:41.8 |
HIP 80486 |
7.61 |
| 2026-06-10 00:00 |
16:26:06.70 |
-33:28:30.5 |
HIP 80486 |
7.11 |
| 2026-06-10 12:00 |
16:26:02.15 |
-33:28:19.1 |
HIP 80486 |
6.71 |
| 2026-06-11 00:00 |
16:25:57.61 |
-33:28:07.5 |
HIP 80486 |
6.44 |
| 2026-06-11 12:00 |
16:25:53.07 |
-33:27:55.9 |
HIP 80486 |
6.31 |
| 2026-06-12 00:00 |
16:25:48.55 |
-33:27:44.2 |
HIP 80486 |
6.33 |
| 2026-06-12 12:00 |
16:25:44.04 |
-33:27:32.4 |
HIP 80486 |
6.49 |
| 2026-06-13 00:00 |
16:25:39.53 |
-33:27:20.5 |
HIP 80486 |
6.78 |
| 2026-06-13 12:00 |
16:25:35.04 |
-33:27:08.5 |
HIP 80486 |
7.20 |
| 2026-06-14 00:00 |
16:25:30.56 |
-33:26:56.4 |
HIP 80486 |
7.71 |
| 2026-06-14 12:00 |
16:25:26.09 |
-33:26:44.2 |
HIP 80486 |
8.30 |
| 2026-06-15 00:00 |
16:25:21.64 |
-33:26:31.9 |
HIP 80486 |
8.96 |
| 2026-06-15 12:00 |
16:25:17.19 |
-33:26:19.5 |
HIP 80486 |
9.66 |
| 2026-06-16 00:00 |
16:25:12.76 |
-33:26:07.1 |
HIP 80486 |
10.40 |
| 2026-06-16 12:00 |
16:25:08.35 |
-33:25:54.5 |
HIP 80486 |
11.17 |
| 2026-06-17 00:00 |
16:25:03.95 |
-33:25:41.8 |
HIP 80486 |
11.97 |
| 2026-06-17 12:00 |
16:24:59.56 |
-33:25:29.1 |
HIP 80486 |
12.78 |
| 2026-06-18 00:00 |
16:24:55.18 |
-33:25:16.3 |
HIP 80486 |
13.61 |
| 2026-06-18 12:00 |
16:24:50.83 |
-33:25:03.4 |
HIP 80486 |
14.45 |
| 2026-06-19 00:00 |
16:24:46.48 |
-33:24:50.4 |
HIP 80486 |
15.30 |
| 2026-06-19 12:00 |
16:24:42.16 |
-33:24:37.3 |
HIP 80324 |
15.83 |
| 2026-06-20 00:00 |
16:24:37.85 |
-33:24:24.1 |
HIP 80324 |
15.12 |
| 2026-06-20 12:00 |
16:24:33.56 |
-33:24:10.9 |
HIP 80324 |
14.44 |
| 2026-06-21 00:00 |
16:24:29.28 |
-33:23:57.6 |
HIP 80324 |
13.79 |
| 2026-06-21 12:00 |
16:24:25.02 |
-33:23:44.2 |
HIP 80324 |
13.18 |
| 2026-06-22 00:00 |
16:24:20.78 |
-33:23:30.7 |
HIP 80324 |
12.60 |