메타데이터
| 항목 |
값 |
| Designation |
499P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-04T09:55:03.910080Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:43:01Z |
| Obs used |
468 |
| NEO |
Yes |
| M1 |
19.600 |
| K1 |
4.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-02-28.0000000 |
| e |
0.69137458 |
| q (au) |
0.930634 |
| a (au) |
3.015417 |
| i (deg) |
24.586385 |
| Ω (om, deg) |
139.328525 |
| ω (w, deg) |
2.563338 |
| M (ma, deg) |
290.278038 |
밝기
산란 + 전체 선형
$$
M_a = (19.673 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.673 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
20:31:15.72 |
-06:25:32.0 |
HIP 101436 |
34.55 |
| 2026-06-01 12:00 |
20:31:05.56 |
-06:25:50.6 |
HIP 101189 |
36.87 |
| 2026-06-02 00:00 |
20:30:55.15 |
-06:26:10.6 |
HIP 101189 |
36.83 |
| 2026-06-02 12:00 |
20:30:44.49 |
-06:26:32.0 |
HIP 101189 |
37.00 |
| 2026-06-03 00:00 |
20:30:33.58 |
-06:26:54.8 |
HIP 101189 |
37.39 |
| 2026-06-03 12:00 |
20:30:22.42 |
-06:27:19.1 |
HIP 101189 |
38.00 |
| 2026-06-04 00:00 |
20:30:11.01 |
-06:27:44.7 |
HIP 100930 |
37.06 |
| 2026-06-04 12:00 |
20:29:59.35 |
-06:28:11.7 |
HIP 100930 |
34.19 |
| 2026-06-05 00:00 |
20:29:47.44 |
-06:28:40.1 |
HIP 100930 |
31.26 |
| 2026-06-05 12:00 |
20:29:35.28 |
-06:29:10.0 |
HIP 100930 |
28.29 |
| 2026-06-06 00:00 |
20:29:22.88 |
-06:29:41.3 |
HIP 100930 |
25.26 |
| 2026-06-06 12:00 |
20:29:10.23 |
-06:30:14.0 |
HIP 100930 |
22.20 |
| 2026-06-07 00:00 |
20:28:57.34 |
-06:30:48.1 |
HIP 100930 |
19.12 |
| 2026-06-07 12:00 |
20:28:44.21 |
-06:31:23.7 |
HIP 100930 |
16.04 |
| 2026-06-08 00:00 |
20:28:30.83 |
-06:32:00.7 |
HIP 100930 |
13.02 |
| 2026-06-08 12:00 |
20:28:17.21 |
-06:32:39.2 |
HIP 100930 |
10.17 |
| 2026-06-09 00:00 |
20:28:03.35 |
-06:33:19.1 |
HIP 100930 |
7.76 |
| 2026-06-09 12:00 |
20:27:49.25 |
-06:34:00.5 |
HIP 100930 |
6.43 |
| 2026-06-10 00:00 |
20:27:34.91 |
-06:34:43.3 |
HIP 100930 |
6.93 |
| 2026-06-10 12:00 |
20:27:20.34 |
-06:35:27.6 |
HIP 100930 |
9.05 |
| 2026-06-11 00:00 |
20:27:05.53 |
-06:36:13.3 |
HIP 100930 |
12.00 |
| 2026-06-11 12:00 |
20:26:50.49 |
-06:37:00.5 |
HIP 100930 |
15.36 |
| 2026-06-12 00:00 |
20:26:35.21 |
-06:37:49.1 |
HIP 100930 |
18.95 |
| 2026-06-12 12:00 |
20:26:19.70 |
-06:38:39.2 |
HIP 100930 |
22.69 |
| 2026-06-13 00:00 |
20:26:03.97 |
-06:39:30.8 |
HIP 100698 |
19.09 |
| 2026-06-13 12:00 |
20:25:48.00 |
-06:40:23.9 |
HIP 100698 |
15.16 |
| 2026-06-14 00:00 |
20:25:31.81 |
-06:41:18.4 |
HIP 100698 |
11.26 |
| 2026-06-14 12:00 |
20:25:15.40 |
-06:42:14.4 |
HIP 100698 |
7.55 |
| 2026-06-15 00:00 |
20:24:58.77 |
-06:43:11.8 |
HIP 100698 |
4.66 |
| 2026-06-15 12:00 |
20:24:41.91 |
-06:44:10.7 |
HIP 100676 |
2.79 |
| 2026-06-16 00:00 |
20:24:24.84 |
-06:45:11.1 |
HIP 100676 |
4.85 |
| 2026-06-16 12:00 |
20:24:07.55 |
-06:46:12.9 |
HIP 100676 |
8.84 |
| 2026-06-17 00:00 |
20:23:50.04 |
-06:47:16.2 |
HIP 100676 |
13.16 |
| 2026-06-17 12:00 |
20:23:32.33 |
-06:48:21.0 |
HIP 100676 |
17.60 |
| 2026-06-18 00:00 |
20:23:14.41 |
-06:49:27.2 |
HIP 100676 |
22.14 |
| 2026-06-18 12:00 |
20:22:56.28 |
-06:50:34.8 |
HIP 100427 |
22.63 |
| 2026-06-19 00:00 |
20:22:37.95 |
-06:51:43.9 |
HIP 100427 |
20.78 |
| 2026-06-19 12:00 |
20:22:19.41 |
-06:52:54.5 |
HIP 100427 |
19.91 |
| 2026-06-20 00:00 |
20:22:00.68 |
-06:54:06.4 |
HIP 100427 |
20.17 |
| 2026-06-20 12:00 |
20:21:41.75 |
-06:55:19.8 |
HIP 100427 |
21.55 |
| 2026-06-21 00:00 |
20:21:22.63 |
-06:56:34.6 |
HIP 100427 |
23.90 |
| 2026-06-21 12:00 |
20:21:03.31 |
-06:57:50.9 |
HIP 100427 |
26.99 |
| 2026-06-22 00:00 |
20:20:43.81 |
-06:59:08.5 |
HIP 100427 |
30.62 |