메타데이터
| 항목 |
값 |
| Designation |
319P/Catalina-McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-07-01T22:02:55.170240Z |
| Orbit solution date (soln_date, UTC) |
2025-04-24T09:42:33Z |
| Obs used |
371 |
| NEO |
Yes |
| M1 |
17.100 |
| K1 |
8.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-10-04.0000000 |
| e |
0.66499524 |
| q (au) |
1.196987 |
| a (au) |
3.573045 |
| i (deg) |
15.074177 |
| Ω (om, deg) |
111.366470 |
| ω (w, deg) |
203.679689 |
| M (ma, deg) |
267.200002 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-07-29 00:00 |
10:00:13.15 |
+20:38:06.9 |
HIP 49026 |
37.72 |
| 2026-07-29 12:00 |
10:00:34.47 |
+20:36:18.1 |
HIP 49244 |
36.99 |
| 2026-07-30 00:00 |
10:00:55.82 |
+20:34:29.1 |
HIP 49244 |
32.69 |
| 2026-07-30 12:00 |
10:01:17.21 |
+20:32:40.1 |
HIP 49244 |
28.72 |
| 2026-07-31 00:00 |
10:01:38.64 |
+20:30:51.0 |
HIP 49244 |
25.25 |
| 2026-07-31 12:00 |
10:02:00.10 |
+20:29:01.8 |
HIP 49244 |
22.51 |
| 2026-08-01 00:00 |
10:02:21.60 |
+20:27:12.5 |
HIP 49244 |
20.80 |
| 2026-08-01 12:00 |
10:02:43.13 |
+20:25:23.1 |
HIP 49244 |
20.40 |
| 2026-08-02 00:00 |
10:03:04.69 |
+20:23:33.7 |
HIP 49244 |
21.37 |
| 2026-08-02 12:00 |
10:03:26.29 |
+20:21:44.2 |
HIP 49244 |
23.56 |
| 2026-08-03 00:00 |
10:03:47.93 |
+20:19:54.6 |
HIP 49244 |
26.68 |
| 2026-08-03 12:00 |
10:04:09.59 |
+20:18:04.9 |
HIP 49407 |
27.10 |
| 2026-08-04 00:00 |
10:04:31.29 |
+20:16:15.2 |
HIP 49407 |
23.13 |
| 2026-08-04 12:00 |
10:04:53.02 |
+20:14:25.4 |
HIP 49407 |
19.86 |
| 2026-08-05 00:00 |
10:05:14.78 |
+20:12:35.6 |
HIP 49407 |
17.69 |
| 2026-08-05 12:00 |
10:05:36.58 |
+20:10:45.7 |
HIP 49407 |
17.03 |
| 2026-08-06 00:00 |
10:05:58.40 |
+20:08:55.7 |
HIP 49407 |
18.07 |
| 2026-08-06 12:00 |
10:06:20.25 |
+20:07:05.7 |
HIP 49407 |
20.55 |
| 2026-08-07 00:00 |
10:06:42.13 |
+20:05:15.7 |
HIP 49664 |
23.53 |
| 2026-08-07 12:00 |
10:07:04.04 |
+20:03:25.6 |
HIP 49664 |
18.12 |
| 2026-08-08 00:00 |
10:07:25.97 |
+20:01:35.4 |
HIP 49664 |
12.76 |
| 2026-08-08 12:00 |
10:07:47.93 |
+19:59:45.3 |
HIP 49664 |
7.54 |
| 2026-08-09 00:00 |
10:08:09.92 |
+19:57:55.1 |
HIP 49664 |
3.30 |
| 2026-08-09 12:00 |
10:08:31.94 |
+19:56:04.9 |
HIP 49664 |
5.01 |
| 2026-08-10 00:00 |
10:08:53.98 |
+19:54:14.6 |
HIP 49664 |
9.98 |
| 2026-08-10 12:00 |
10:09:16.04 |
+19:52:24.4 |
HIP 49664 |
15.32 |
| 2026-08-11 00:00 |
10:09:38.13 |
+19:50:34.1 |
HIP 49664 |
20.75 |
| 2026-08-11 12:00 |
10:10:00.24 |
+19:48:43.8 |
HIP 49664 |
26.22 |
| 2026-08-12 00:00 |
10:10:22.37 |
+19:46:53.5 |
HIP 49966 |
31.10 |
| 2026-08-12 12:00 |
10:10:44.53 |
+19:45:03.2 |
HIP 49966 |
28.75 |
| 2026-08-13 00:00 |
10:11:06.70 |
+19:43:12.9 |
HIP 49966 |
27.31 |
| 2026-08-13 12:00 |
10:11:28.90 |
+19:41:22.6 |
HIP 49946 |
24.11 |
| 2026-08-14 00:00 |
10:11:51.11 |
+19:39:32.4 |
HIP 49946 |
21.69 |
| 2026-08-14 12:00 |
10:12:13.35 |
+19:37:42.1 |
HIP 49946 |
20.53 |
| 2026-08-15 00:00 |
10:12:35.60 |
+19:35:51.9 |
HIP 49946 |
20.84 |
| 2026-08-15 12:00 |
10:12:57.87 |
+19:34:01.7 |
HIP 49946 |
22.56 |
| 2026-08-16 00:00 |
10:13:20.16 |
+19:32:11.5 |
HIP 49946 |
25.41 |
| 2026-08-16 12:00 |
10:13:42.46 |
+19:30:21.4 |
HIP 49946 |
29.06 |
| 2026-08-17 00:00 |
10:14:04.78 |
+19:28:31.3 |
HIP 50223 |
25.90 |
| 2026-08-17 12:00 |
10:14:27.11 |
+19:26:41.2 |
HIP 50223 |
21.59 |
| 2026-08-18 00:00 |
10:14:49.45 |
+19:24:51.2 |
HIP 50223 |
17.98 |
| 2026-08-18 12:00 |
10:15:11.81 |
+19:23:01.2 |
HIP 50223 |
15.58 |
| 2026-08-19 00:00 |
10:15:34.19 |
+19:21:11.3 |
HIP 50223 |
14.99 |