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) |
| 2026-07-29 00:00 |
16:20:17.54 |
-33:04:56.1 |
HIP 80080 |
4.61 |
| 2026-07-29 12:00 |
16:20:15.46 |
-33:04:40.7 |
HIP 80080 |
5.11 |
| 2026-07-30 00:00 |
16:20:13.42 |
-33:04:25.4 |
HIP 80080 |
5.60 |
| 2026-07-30 12:00 |
16:20:11.41 |
-33:04:10.1 |
HIP 80080 |
6.09 |
| 2026-07-31 00:00 |
16:20:09.44 |
-33:03:54.8 |
HIP 80080 |
6.57 |
| 2026-07-31 12:00 |
16:20:07.51 |
-33:03:39.6 |
HIP 80080 |
7.04 |
| 2026-08-01 00:00 |
16:20:05.62 |
-33:03:24.4 |
HIP 80080 |
7.51 |
| 2026-08-01 12:00 |
16:20:03.76 |
-33:03:09.2 |
HIP 80080 |
7.96 |
| 2026-08-02 00:00 |
16:20:01.94 |
-33:02:54.1 |
HIP 80080 |
8.42 |
| 2026-08-02 12:00 |
16:20:00.17 |
-33:02:39.0 |
HIP 80080 |
8.86 |
| 2026-08-03 00:00 |
16:19:58.43 |
-33:02:23.9 |
HIP 80080 |
9.30 |
| 2026-08-03 12:00 |
16:19:56.72 |
-33:02:08.9 |
HIP 80080 |
9.73 |
| 2026-08-04 00:00 |
16:19:55.06 |
-33:01:53.9 |
HIP 80080 |
10.15 |
| 2026-08-04 12:00 |
16:19:53.44 |
-33:01:39.0 |
HIP 80080 |
10.57 |
| 2026-08-05 00:00 |
16:19:51.85 |
-33:01:24.1 |
HIP 80080 |
10.98 |
| 2026-08-05 12:00 |
16:19:50.30 |
-33:01:09.2 |
HIP 80080 |
11.38 |
| 2026-08-06 00:00 |
16:19:48.80 |
-33:00:54.4 |
HIP 80080 |
11.78 |
| 2026-08-06 12:00 |
16:19:47.33 |
-33:00:39.6 |
HIP 80080 |
12.17 |
| 2026-08-07 00:00 |
16:19:45.90 |
-33:00:24.9 |
HIP 80080 |
12.55 |
| 2026-08-07 12:00 |
16:19:44.51 |
-33:00:10.2 |
HIP 80080 |
12.92 |
| 2026-08-08 00:00 |
16:19:43.16 |
-32:59:55.5 |
HIP 80080 |
13.29 |
| 2026-08-08 12:00 |
16:19:41.85 |
-32:59:41.0 |
HIP 80080 |
13.65 |
| 2026-08-09 00:00 |
16:19:40.58 |
-32:59:26.4 |
HIP 80080 |
14.00 |
| 2026-08-09 12:00 |
16:19:39.35 |
-32:59:12.0 |
HIP 80080 |
14.34 |
| 2026-08-10 00:00 |
16:19:38.16 |
-32:58:57.5 |
HIP 80080 |
14.68 |
| 2026-08-10 12:00 |
16:19:37.02 |
-32:58:43.2 |
HIP 80080 |
15.01 |
| 2026-08-11 00:00 |
16:19:35.91 |
-32:58:28.9 |
HIP 80080 |
15.33 |
| 2026-08-11 12:00 |
16:19:34.84 |
-32:58:14.6 |
HIP 79883 |
15.63 |
| 2026-08-12 00:00 |
16:19:33.81 |
-32:58:00.4 |
HIP 79883 |
15.41 |
| 2026-08-12 12:00 |
16:19:32.83 |
-32:57:46.3 |
HIP 79883 |
15.20 |
| 2026-08-13 00:00 |
16:19:31.88 |
-32:57:32.2 |
HIP 79883 |
15.00 |
| 2026-08-13 12:00 |
16:19:30.98 |
-32:57:18.2 |
HIP 79883 |
14.81 |
| 2026-08-14 00:00 |
16:19:30.11 |
-32:57:04.2 |
HIP 79883 |
14.64 |
| 2026-08-14 12:00 |
16:19:29.29 |
-32:56:50.3 |
HIP 79883 |
14.48 |
| 2026-08-15 00:00 |
16:19:28.51 |
-32:56:36.5 |
HIP 79883 |
14.33 |
| 2026-08-15 12:00 |
16:19:27.77 |
-32:56:22.8 |
HIP 79883 |
14.19 |
| 2026-08-16 00:00 |
16:19:27.07 |
-32:56:09.1 |
HIP 79883 |
14.07 |
| 2026-08-16 12:00 |
16:19:26.41 |
-32:55:55.5 |
HIP 79883 |
13.96 |
| 2026-08-17 00:00 |
16:19:25.80 |
-32:55:41.9 |
HIP 79883 |
13.86 |
| 2026-08-17 12:00 |
16:19:25.22 |
-32:55:28.5 |
HIP 79883 |
13.77 |
| 2026-08-18 00:00 |
16:19:24.69 |
-32:55:15.1 |
HIP 79883 |
13.70 |
| 2026-08-18 12:00 |
16:19:24.20 |
-32:55:01.7 |
HIP 79883 |
13.64 |
| 2026-08-19 00:00 |
16:19:23.74 |
-32:54:48.5 |
HIP 79883 |
13.59 |