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) |
| 2026-05-12 00:00 |
01:48:17.43 |
+15:48:20.8 |
HIP 8262 |
27.48 |
| 2026-05-12 12:00 |
01:48:23.02 |
+15:48:58.7 |
HIP 8262 |
28.92 |
| 2026-05-13 00:00 |
01:48:28.59 |
+15:49:36.7 |
HIP 8414 |
28.78 |
| 2026-05-13 12:00 |
01:48:34.14 |
+15:50:14.6 |
HIP 8414 |
28.12 |
| 2026-05-14 00:00 |
01:48:39.67 |
+15:50:52.4 |
HIP 8414 |
27.53 |
| 2026-05-14 12:00 |
01:48:45.18 |
+15:51:30.2 |
HIP 8414 |
27.01 |
| 2026-05-15 00:00 |
01:48:50.66 |
+15:52:07.9 |
HIP 8414 |
26.56 |
| 2026-05-15 12:00 |
01:48:56.13 |
+15:52:45.6 |
HIP 8414 |
26.19 |
| 2026-05-16 00:00 |
01:49:01.57 |
+15:53:23.2 |
HIP 8414 |
25.89 |
| 2026-05-16 12:00 |
01:49:06.99 |
+15:54:00.7 |
HIP 8414 |
25.66 |
| 2026-05-17 00:00 |
01:49:12.39 |
+15:54:38.2 |
HIP 8414 |
25.52 |
| 2026-05-17 12:00 |
01:49:17.77 |
+15:55:15.6 |
HIP 8414 |
25.45 |
| 2026-05-18 00:00 |
01:49:23.12 |
+15:55:52.9 |
HIP 8414 |
25.47 |
| 2026-05-18 12:00 |
01:49:28.44 |
+15:56:30.1 |
HIP 8414 |
25.56 |
| 2026-05-19 00:00 |
01:49:33.74 |
+15:57:07.3 |
HIP 8414 |
25.73 |
| 2026-05-19 12:00 |
01:49:39.02 |
+15:57:44.4 |
HIP 8414 |
25.97 |
| 2026-05-20 00:00 |
01:49:44.27 |
+15:58:21.4 |
HIP 8414 |
26.28 |
| 2026-05-20 12:00 |
01:49:49.49 |
+15:58:58.3 |
HIP 8414 |
26.66 |
| 2026-05-21 00:00 |
01:49:54.69 |
+15:59:35.2 |
HIP 8414 |
27.10 |
| 2026-05-21 12:00 |
01:49:59.86 |
+16:00:11.9 |
HIP 8448 |
27.38 |
| 2026-05-22 00:00 |
01:50:05.00 |
+16:00:48.6 |
HIP 8448 |
27.62 |
| 2026-05-22 12:00 |
01:50:10.12 |
+16:01:25.2 |
HIP 8448 |
27.92 |
| 2026-05-23 00:00 |
01:50:15.21 |
+16:02:01.6 |
HIP 8448 |
28.29 |
| 2026-05-23 12:00 |
01:50:20.27 |
+16:02:38.0 |
HIP 8667 |
28.36 |
| 2026-05-24 00:00 |
01:50:25.30 |
+16:03:14.3 |
HIP 8667 |
27.11 |
| 2026-05-24 12:00 |
01:50:30.30 |
+16:03:50.5 |
HIP 8667 |
25.88 |
| 2026-05-25 00:00 |
01:50:35.27 |
+16:04:26.5 |
HIP 8667 |
24.67 |
| 2026-05-25 12:00 |
01:50:40.21 |
+16:05:02.5 |
HIP 8667 |
23.47 |
| 2026-05-26 00:00 |
01:50:45.12 |
+16:05:38.4 |
HIP 8667 |
22.30 |
| 2026-05-26 12:00 |
01:50:50.01 |
+16:06:14.1 |
HIP 8667 |
21.15 |
| 2026-05-27 00:00 |
01:50:54.86 |
+16:06:49.8 |
HIP 8667 |
20.02 |
| 2026-05-27 12:00 |
01:50:59.68 |
+16:07:25.3 |
HIP 8667 |
18.93 |
| 2026-05-28 00:00 |
01:51:04.46 |
+16:08:00.7 |
HIP 8667 |
17.87 |
| 2026-05-28 12:00 |
01:51:09.22 |
+16:08:36.0 |
HIP 8667 |
16.84 |
| 2026-05-29 00:00 |
01:51:13.94 |
+16:09:11.2 |
HIP 8667 |
15.86 |
| 2026-05-29 12:00 |
01:51:18.64 |
+16:09:46.3 |
HIP 8667 |
14.92 |
| 2026-05-30 00:00 |
01:51:23.29 |
+16:10:21.2 |
HIP 8667 |
14.05 |
| 2026-05-30 12:00 |
01:51:27.92 |
+16:10:56.1 |
HIP 8667 |
13.23 |
| 2026-05-31 00:00 |
01:51:32.51 |
+16:11:30.7 |
HIP 8667 |
12.50 |
| 2026-05-31 12:00 |
01:51:37.07 |
+16:12:05.3 |
HIP 8667 |
11.85 |
| 2026-06-01 00:00 |
01:51:41.59 |
+16:12:39.8 |
HIP 8667 |
11.30 |
| 2026-06-01 12:00 |
01:51:46.08 |
+16:13:14.1 |
HIP 8667 |
10.86 |
| 2026-06-02 00:00 |
01:51:50.53 |
+16:13:48.2 |
HIP 8667 |
10.55 |