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) |
| 2026-07-29 00:00 |
19:51:45.28 |
-09:28:21.9 |
HIP 97701 |
6.90 |
| 2026-07-29 12:00 |
19:51:21.39 |
-09:30:52.5 |
HIP 97701 |
0.71 |
| 2026-07-30 00:00 |
19:50:57.60 |
-09:33:23.4 |
HIP 97701 |
5.92 |
| 2026-07-30 12:00 |
19:50:33.89 |
-09:35:54.6 |
HIP 97701 |
12.27 |
| 2026-07-31 00:00 |
19:50:10.29 |
-09:38:26.1 |
HIP 97701 |
18.61 |
| 2026-07-31 12:00 |
19:49:46.78 |
-09:40:57.9 |
HIP 97592 |
20.27 |
| 2026-08-01 00:00 |
19:49:23.38 |
-09:43:30.0 |
HIP 97592 |
20.42 |
| 2026-08-01 12:00 |
19:49:00.08 |
-09:46:02.3 |
HIP 97592 |
22.39 |
| 2026-08-02 00:00 |
19:48:36.90 |
-09:48:34.9 |
HIP 97380 |
18.53 |
| 2026-08-02 12:00 |
19:48:13.82 |
-09:51:07.7 |
HIP 97380 |
15.18 |
| 2026-08-03 00:00 |
19:47:50.87 |
-09:53:40.7 |
HIP 97353 |
13.96 |
| 2026-08-03 12:00 |
19:47:28.03 |
-09:56:13.9 |
HIP 97353 |
8.42 |
| 2026-08-04 00:00 |
19:47:05.32 |
-09:58:47.3 |
HIP 97353 |
4.80 |
| 2026-08-04 12:00 |
19:46:42.74 |
-10:01:20.8 |
HIP 97353 |
7.10 |
| 2026-08-05 00:00 |
19:46:20.28 |
-10:03:54.5 |
HIP 97353 |
12.32 |
| 2026-08-05 12:00 |
19:45:57.96 |
-10:06:28.3 |
HIP 97353 |
18.06 |
| 2026-08-06 00:00 |
19:45:35.78 |
-10:09:02.1 |
HIP 97353 |
23.93 |
| 2026-08-06 12:00 |
19:45:13.73 |
-10:11:36.1 |
HIP 97157 |
23.26 |
| 2026-08-07 00:00 |
19:44:51.83 |
-10:14:10.1 |
HIP 97157 |
20.20 |
| 2026-08-07 12:00 |
19:44:30.08 |
-10:16:44.2 |
HIP 97157 |
18.60 |
| 2026-08-08 00:00 |
19:44:08.48 |
-10:19:18.4 |
HIP 97157 |
18.80 |
| 2026-08-08 12:00 |
19:43:47.03 |
-10:21:52.5 |
HIP 97157 |
20.72 |
| 2026-08-09 00:00 |
19:43:25.74 |
-10:24:26.7 |
HIP 97030 |
16.69 |
| 2026-08-09 12:00 |
19:43:04.60 |
-10:27:00.8 |
HIP 97030 |
13.86 |
| 2026-08-10 00:00 |
19:42:43.63 |
-10:29:34.9 |
HIP 97030 |
13.12 |
| 2026-08-10 12:00 |
19:42:22.83 |
-10:32:09.0 |
HIP 97030 |
14.75 |
| 2026-08-11 00:00 |
19:42:02.19 |
-10:34:43.0 |
HIP 97030 |
18.08 |
| 2026-08-11 12:00 |
19:41:41.73 |
-10:37:16.9 |
HIP 97030 |
22.34 |
| 2026-08-12 00:00 |
19:41:21.44 |
-10:39:50.8 |
HIP 96841 |
25.82 |
| 2026-08-12 12:00 |
19:41:01.32 |
-10:42:24.5 |
HIP 96841 |
23.00 |
| 2026-08-13 00:00 |
19:40:41.39 |
-10:44:58.1 |
HIP 96841 |
21.28 |
| 2026-08-13 12:00 |
19:40:21.65 |
-10:47:31.5 |
HIP 96841 |
20.89 |
| 2026-08-14 00:00 |
19:40:02.08 |
-10:50:04.8 |
HIP 96841 |
21.88 |
| 2026-08-14 12:00 |
19:39:42.71 |
-10:52:37.9 |
HIP 96841 |
24.06 |
| 2026-08-15 00:00 |
19:39:23.53 |
-10:55:10.8 |
HIP 96841 |
27.10 |
| 2026-08-15 12:00 |
19:39:04.54 |
-10:57:43.5 |
HIP 96841 |
30.73 |
| 2026-08-16 00:00 |
19:38:45.75 |
-11:00:15.9 |
HIP 96454 |
34.68 |
| 2026-08-16 12:00 |
19:38:27.16 |
-11:02:48.2 |
HIP 96454 |
29.48 |
| 2026-08-17 00:00 |
19:38:08.77 |
-11:05:20.1 |
HIP 96454 |
24.35 |
| 2026-08-17 12:00 |
19:37:50.58 |
-11:07:51.8 |
HIP 96454 |
19.27 |
| 2026-08-18 00:00 |
19:37:32.60 |
-11:10:23.3 |
HIP 96454 |
14.29 |
| 2026-08-18 12:00 |
19:37:14.82 |
-11:12:54.4 |
HIP 96454 |
9.47 |
| 2026-08-19 00:00 |
19:36:57.25 |
-11:15:25.2 |
HIP 96454 |
5.14 |