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) |
| 2026-09-20 00:00 |
07:02:34.07 |
-32:38:15.2 |
HIP 34031 |
24.54 |
| 2026-09-20 12:00 |
07:02:34.95 |
-32:38:51.0 |
HIP 34031 |
23.94 |
| 2026-09-21 00:00 |
07:02:35.81 |
-32:39:26.9 |
HIP 34031 |
23.34 |
| 2026-09-21 12:00 |
07:02:36.64 |
-32:40:02.8 |
HIP 34031 |
22.74 |
| 2026-09-22 00:00 |
07:02:37.44 |
-32:40:38.8 |
HIP 34031 |
22.15 |
| 2026-09-22 12:00 |
07:02:38.20 |
-32:41:14.9 |
HIP 34031 |
21.57 |
| 2026-09-23 00:00 |
07:02:38.94 |
-32:41:51.1 |
HIP 34031 |
20.98 |
| 2026-09-23 12:00 |
07:02:39.65 |
-32:42:27.3 |
HIP 34031 |
20.41 |
| 2026-09-24 00:00 |
07:02:40.33 |
-32:43:03.5 |
HIP 34031 |
19.84 |
| 2026-09-24 12:00 |
07:02:40.97 |
-32:43:39.9 |
HIP 34031 |
19.27 |
| 2026-09-25 00:00 |
07:02:41.59 |
-32:44:16.3 |
HIP 34031 |
18.72 |
| 2026-09-25 12:00 |
07:02:42.17 |
-32:44:52.7 |
HIP 34031 |
18.17 |
| 2026-09-26 00:00 |
07:02:42.73 |
-32:45:29.2 |
HIP 34031 |
17.63 |
| 2026-09-26 12:00 |
07:02:43.25 |
-32:46:05.8 |
HIP 34031 |
17.09 |
| 2026-09-27 00:00 |
07:02:43.75 |
-32:46:42.4 |
HIP 34031 |
16.57 |
| 2026-09-27 12:00 |
07:02:44.21 |
-32:47:19.0 |
HIP 34031 |
16.06 |
| 2026-09-28 00:00 |
07:02:44.64 |
-32:47:55.7 |
HIP 34031 |
15.56 |
| 2026-09-28 12:00 |
07:02:45.04 |
-32:48:32.4 |
HIP 34031 |
15.07 |
| 2026-09-29 00:00 |
07:02:45.41 |
-32:49:09.1 |
HIP 34031 |
14.60 |
| 2026-09-29 12:00 |
07:02:45.75 |
-32:49:45.9 |
HIP 34031 |
14.14 |
| 2026-09-30 00:00 |
07:02:46.06 |
-32:50:22.8 |
HIP 34031 |
13.70 |
| 2026-09-30 12:00 |
07:02:46.34 |
-32:50:59.6 |
HIP 34031 |
13.28 |
| 2026-10-01 00:00 |
07:02:46.58 |
-32:51:36.5 |
HIP 34031 |
12.88 |
| 2026-10-01 12:00 |
07:02:46.80 |
-32:52:13.4 |
HIP 34031 |
12.50 |
| 2026-10-02 00:00 |
07:02:46.98 |
-32:52:50.3 |
HIP 34031 |
12.15 |
| 2026-10-02 12:00 |
07:02:47.13 |
-32:53:27.3 |
HIP 34031 |
11.83 |
| 2026-10-03 00:00 |
07:02:47.25 |
-32:54:04.2 |
HIP 34031 |
11.53 |
| 2026-10-03 12:00 |
07:02:47.34 |
-32:54:41.2 |
HIP 34031 |
11.27 |
| 2026-10-04 00:00 |
07:02:47.39 |
-32:55:18.2 |
HIP 34031 |
11.04 |
| 2026-10-04 12:00 |
07:02:47.42 |
-32:55:55.2 |
HIP 34031 |
10.85 |
| 2026-10-05 00:00 |
07:02:47.41 |
-32:56:32.2 |
HIP 34031 |
10.70 |
| 2026-10-05 12:00 |
07:02:47.37 |
-32:57:09.2 |
HIP 34031 |
10.59 |
| 2026-10-06 00:00 |
07:02:47.30 |
-32:57:46.2 |
HIP 34031 |
10.52 |
| 2026-10-06 12:00 |
07:02:47.19 |
-32:58:23.1 |
HIP 34031 |
10.49 |
| 2026-10-07 00:00 |
07:02:47.05 |
-32:59:00.1 |
HIP 34031 |
10.51 |
| 2026-10-07 12:00 |
07:02:46.89 |
-32:59:37.1 |
HIP 34031 |
10.57 |
| 2026-10-08 00:00 |
07:02:46.69 |
-33:00:14.1 |
HIP 34031 |
10.67 |
| 2026-10-08 12:00 |
07:02:46.45 |
-33:00:51.0 |
HIP 34031 |
10.81 |
| 2026-10-09 00:00 |
07:02:46.19 |
-33:01:27.9 |
HIP 34031 |
10.99 |
| 2026-10-09 12:00 |
07:02:45.89 |
-33:02:04.8 |
HIP 34031 |
11.21 |
| 2026-10-10 00:00 |
07:02:45.56 |
-33:02:41.7 |
HIP 34031 |
11.46 |
| 2026-10-10 12:00 |
07:02:45.20 |
-33:03:18.6 |
HIP 34031 |
11.75 |
| 2026-10-11 00:00 |
07:02:44.80 |
-33:03:55.4 |
HIP 34031 |
12.07 |