메타데이터
| 항목 |
값 |
| Designation |
C/2014 J1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-06-20T00:22:18.560640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:54Z |
| Obs used |
103 |
| NEO |
- |
| M1 |
16.800 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-05-17.0000000 |
| e |
0.80239339 |
| q (au) |
1.708541 |
| a (au) |
8.646176 |
| i (deg) |
159.696475 |
| Ω (om, deg) |
41.942129 |
| ω (w, deg) |
195.480026 |
| M (ma, deg) |
358.681304 |
밝기
산란 + 전체 선형
$$
M_a = (19.181 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.181 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.553 |
| k |
0.800 |
| 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 |
01:46:38.37 |
+16:34:36.4 |
HIP 8205 |
24.68 |
| 2026-09-20 12:00 |
01:46:30.73 |
+16:34:05.6 |
HIP 8205 |
23.12 |
| 2026-09-21 00:00 |
01:46:23.06 |
+16:33:34.6 |
HIP 8205 |
21.60 |
| 2026-09-21 12:00 |
01:46:15.34 |
+16:33:03.3 |
HIP 8205 |
20.14 |
| 2026-09-22 00:00 |
01:46:07.59 |
+16:32:31.7 |
HIP 8205 |
18.75 |
| 2026-09-22 12:00 |
01:45:59.80 |
+16:31:59.8 |
HIP 8205 |
17.46 |
| 2026-09-23 00:00 |
01:45:51.98 |
+16:31:27.5 |
HIP 8205 |
16.30 |
| 2026-09-23 12:00 |
01:45:44.12 |
+16:30:55.0 |
HIP 8205 |
15.28 |
| 2026-09-24 00:00 |
01:45:36.22 |
+16:30:22.2 |
HIP 8205 |
14.46 |
| 2026-09-24 12:00 |
01:45:28.29 |
+16:29:49.1 |
HIP 8205 |
13.87 |
| 2026-09-25 00:00 |
01:45:20.33 |
+16:29:15.6 |
HIP 8205 |
13.54 |
| 2026-09-25 12:00 |
01:45:12.33 |
+16:28:41.9 |
HIP 8205 |
13.49 |
| 2026-09-26 00:00 |
01:45:04.30 |
+16:28:08.0 |
HIP 8205 |
13.74 |
| 2026-09-26 12:00 |
01:44:56.24 |
+16:27:33.7 |
HIP 8205 |
14.27 |
| 2026-09-27 00:00 |
01:44:48.15 |
+16:26:59.1 |
HIP 8205 |
15.06 |
| 2026-09-27 12:00 |
01:44:40.02 |
+16:26:24.3 |
HIP 8205 |
16.06 |
| 2026-09-28 00:00 |
01:44:31.87 |
+16:25:49.2 |
HIP 8205 |
17.26 |
| 2026-09-28 12:00 |
01:44:23.68 |
+16:25:13.8 |
HIP 8205 |
18.60 |
| 2026-09-29 00:00 |
01:44:15.46 |
+16:24:38.1 |
HIP 8205 |
20.07 |
| 2026-09-29 12:00 |
01:44:07.22 |
+16:24:02.2 |
HIP 8205 |
21.64 |
| 2026-09-30 00:00 |
01:43:58.95 |
+16:23:26.0 |
HIP 8205 |
23.29 |
| 2026-09-30 12:00 |
01:43:50.65 |
+16:22:49.5 |
HIP 8205 |
25.01 |
| 2026-10-01 00:00 |
01:43:42.32 |
+16:22:12.7 |
HIP 8205 |
26.79 |
| 2026-10-01 12:00 |
01:43:33.97 |
+16:21:35.7 |
HIP 8205 |
28.62 |
| 2026-10-02 00:00 |
01:43:25.59 |
+16:20:58.5 |
HIP 8205 |
30.48 |
| 2026-10-02 12:00 |
01:43:17.19 |
+16:20:21.0 |
HIP 7867 |
31.59 |
| 2026-10-03 00:00 |
01:43:08.76 |
+16:19:43.2 |
HIP 7867 |
29.92 |
| 2026-10-03 12:00 |
01:43:00.31 |
+16:19:05.2 |
HIP 7867 |
28.31 |
| 2026-10-04 00:00 |
01:42:51.83 |
+16:18:26.9 |
HIP 7867 |
26.76 |
| 2026-10-04 12:00 |
01:42:43.33 |
+16:17:48.4 |
HIP 7867 |
25.30 |
| 2026-10-05 00:00 |
01:42:34.81 |
+16:17:09.6 |
HIP 7867 |
23.94 |
| 2026-10-05 12:00 |
01:42:26.27 |
+16:16:30.6 |
HIP 7867 |
22.69 |
| 2026-10-06 00:00 |
01:42:17.71 |
+16:15:51.4 |
HIP 7867 |
21.59 |
| 2026-10-06 12:00 |
01:42:09.13 |
+16:15:11.9 |
HIP 7867 |
20.66 |
| 2026-10-07 00:00 |
01:42:00.53 |
+16:14:32.2 |
HIP 7867 |
19.92 |
| 2026-10-07 12:00 |
01:41:51.91 |
+16:13:52.3 |
HIP 7867 |
19.39 |
| 2026-10-08 00:00 |
01:41:43.27 |
+16:13:12.1 |
HIP 7867 |
19.10 |
| 2026-10-08 12:00 |
01:41:34.62 |
+16:12:31.8 |
HIP 7867 |
19.05 |
| 2026-10-09 00:00 |
01:41:25.95 |
+16:11:51.2 |
HIP 7867 |
19.26 |
| 2026-10-09 12:00 |
01:41:17.26 |
+16:11:10.4 |
HIP 7867 |
19.72 |
| 2026-10-10 00:00 |
01:41:08.56 |
+16:10:29.4 |
HIP 7867 |
20.40 |
| 2026-10-10 12:00 |
01:40:59.85 |
+16:09:48.1 |
HIP 7867 |
21.29 |
| 2026-10-11 00:00 |
01:40:51.12 |
+16:09:06.7 |
HIP 7867 |
22.37 |