메타데이터
| 항목 |
값 |
| Designation |
C/2005 N4 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-07-02T14:23:55.170240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:51Z |
| Obs used |
206 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2005-07-14.0000000 |
| e |
0.96061201 |
| q (au) |
2.303757 |
| a (au) |
58.488820 |
| i (deg) |
116.630292 |
| Ω (om, deg) |
64.036800 |
| ω (w, deg) |
136.545857 |
| M (ma, deg) |
0.025119 |
밝기
산란 + 전체 선형
$$
M_a = (15.381 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.381 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.920 |
| 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 |
06:52:15.47 |
-31:55:07.8 |
HIP 32985 |
5.81 |
| 2026-06-01 12:00 |
06:52:18.42 |
-31:54:47.8 |
HIP 32985 |
6.08 |
| 2026-06-02 00:00 |
06:52:21.38 |
-31:54:28.1 |
HIP 32985 |
6.41 |
| 2026-06-02 12:00 |
06:52:24.36 |
-31:54:08.7 |
HIP 32985 |
6.79 |
| 2026-06-03 00:00 |
06:52:27.35 |
-31:53:49.5 |
HIP 32985 |
7.22 |
| 2026-06-03 12:00 |
06:52:30.36 |
-31:53:30.7 |
HIP 32985 |
7.69 |
| 2026-06-04 00:00 |
06:52:33.38 |
-31:53:12.1 |
HIP 32985 |
8.19 |
| 2026-06-04 12:00 |
06:52:36.41 |
-31:52:53.8 |
HIP 33042 |
8.13 |
| 2026-06-05 00:00 |
06:52:39.46 |
-31:52:35.9 |
HIP 33042 |
7.48 |
| 2026-06-05 12:00 |
06:52:42.52 |
-31:52:18.2 |
HIP 33042 |
6.84 |
| 2026-06-06 00:00 |
06:52:45.60 |
-31:52:00.8 |
HIP 33042 |
6.23 |
| 2026-06-06 12:00 |
06:52:48.69 |
-31:51:43.7 |
HIP 33042 |
5.64 |
| 2026-06-07 00:00 |
06:52:51.79 |
-31:51:26.9 |
HIP 33042 |
5.09 |
| 2026-06-07 12:00 |
06:52:54.90 |
-31:51:10.4 |
HIP 33042 |
4.58 |
| 2026-06-08 00:00 |
06:52:58.03 |
-31:50:54.1 |
HIP 33042 |
4.14 |
| 2026-06-08 12:00 |
06:53:01.17 |
-31:50:38.2 |
HIP 33042 |
3.80 |
| 2026-06-09 00:00 |
06:53:04.32 |
-31:50:22.6 |
HIP 33042 |
3.57 |
| 2026-06-09 12:00 |
06:53:07.48 |
-31:50:07.3 |
HIP 33042 |
3.48 |
| 2026-06-10 00:00 |
06:53:10.65 |
-31:49:52.2 |
HIP 33042 |
3.54 |
| 2026-06-10 12:00 |
06:53:13.84 |
-31:49:37.5 |
HIP 33042 |
3.75 |
| 2026-06-11 00:00 |
06:53:17.04 |
-31:49:23.1 |
HIP 33042 |
4.09 |
| 2026-06-11 12:00 |
06:53:20.24 |
-31:49:09.0 |
HIP 33042 |
4.51 |
| 2026-06-12 00:00 |
06:53:23.46 |
-31:48:55.2 |
HIP 33042 |
5.02 |
| 2026-06-12 12:00 |
06:53:26.69 |
-31:48:41.7 |
HIP 33042 |
5.57 |
| 2026-06-13 00:00 |
06:53:29.93 |
-31:48:28.4 |
HIP 33042 |
6.16 |
| 2026-06-13 12:00 |
06:53:33.18 |
-31:48:15.5 |
HIP 33042 |
6.78 |
| 2026-06-14 00:00 |
06:53:36.44 |
-31:48:03.0 |
HIP 33042 |
7.42 |
| 2026-06-14 12:00 |
06:53:39.71 |
-31:47:50.7 |
HIP 33042 |
8.08 |
| 2026-06-15 00:00 |
06:53:42.99 |
-31:47:38.7 |
HIP 33178 |
7.90 |
| 2026-06-15 12:00 |
06:53:46.27 |
-31:47:27.0 |
HIP 33178 |
7.22 |
| 2026-06-16 00:00 |
06:53:49.57 |
-31:47:15.7 |
HIP 33178 |
6.54 |
| 2026-06-16 12:00 |
06:53:52.87 |
-31:47:04.6 |
HIP 33178 |
5.88 |
| 2026-06-17 00:00 |
06:53:56.19 |
-31:46:53.9 |
HIP 33178 |
5.22 |
| 2026-06-17 12:00 |
06:53:59.51 |
-31:46:43.4 |
HIP 33178 |
4.59 |
| 2026-06-18 00:00 |
06:54:02.83 |
-31:46:33.3 |
HIP 33178 |
3.98 |
| 2026-06-18 12:00 |
06:54:06.17 |
-31:46:23.5 |
HIP 33178 |
3.42 |
| 2026-06-19 00:00 |
06:54:09.51 |
-31:46:14.0 |
HIP 33178 |
2.92 |
| 2026-06-19 12:00 |
06:54:12.86 |
-31:46:04.8 |
HIP 33178 |
2.54 |
| 2026-06-20 00:00 |
06:54:16.22 |
-31:45:56.0 |
HIP 33178 |
2.32 |
| 2026-06-20 12:00 |
06:54:19.58 |
-31:45:47.4 |
HIP 33178 |
2.31 |
| 2026-06-21 00:00 |
06:54:22.95 |
-31:45:39.1 |
HIP 33178 |
2.52 |
| 2026-06-21 12:00 |
06:54:26.33 |
-31:45:31.2 |
HIP 33178 |
2.90 |
| 2026-06-22 00:00 |
06:54:29.71 |
-31:45:23.6 |
HIP 33178 |
3.39 |