메타데이터
| 항목 |
값 |
| Designation |
227P/Catalina-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-03-15T05:19:57.423360Z |
| Orbit solution date (soln_date, UTC) |
2025-01-10T09:12:26Z |
| Obs used |
1235 |
| NEO |
- |
| M1 |
12.100 |
| K1 |
18.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-03-27.0000000 |
| e |
0.51043355 |
| q (au) |
1.742453 |
| a (au) |
3.559175 |
| i (deg) |
6.512508 |
| Ω (om, deg) |
48.592710 |
| ω (w, deg) |
90.858601 |
| M (ma, deg) |
200.853061 |
밝기
산란 + 전체 선형
$$
M_a = (11.892 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.892 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-10-09 |
2023-12-06 |
+3.9053 |
+0.883 |
| 2023-12-06 |
2024-03-15 |
+40.6801 |
-8.847 |
| 2024-03-15 |
2024-07-23 |
-1.7736 |
-0.021 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
21:09:52.44 |
-25:09:23.5 |
HIP 104504 |
20.31 |
| 2026-06-01 12:00 |
21:09:48.91 |
-25:10:30.4 |
HIP 104504 |
21.55 |
| 2026-06-02 00:00 |
21:09:45.15 |
-25:11:38.0 |
HIP 104482 |
22.40 |
| 2026-06-02 12:00 |
21:09:41.17 |
-25:12:46.5 |
HIP 104482 |
21.42 |
| 2026-06-03 00:00 |
21:09:36.96 |
-25:13:55.8 |
HIP 104482 |
20.49 |
| 2026-06-03 12:00 |
21:09:32.52 |
-25:15:05.9 |
HIP 104482 |
19.63 |
| 2026-06-04 00:00 |
21:09:27.86 |
-25:16:16.8 |
HIP 104482 |
18.87 |
| 2026-06-04 12:00 |
21:09:22.98 |
-25:17:28.6 |
HIP 104482 |
18.22 |
| 2026-06-05 00:00 |
21:09:17.87 |
-25:18:41.1 |
HIP 104482 |
17.71 |
| 2026-06-05 12:00 |
21:09:12.53 |
-25:19:54.4 |
HIP 104482 |
17.37 |
| 2026-06-06 00:00 |
21:09:06.97 |
-25:21:08.4 |
HIP 104482 |
17.22 |
| 2026-06-06 12:00 |
21:09:01.18 |
-25:22:23.3 |
HIP 104482 |
17.28 |
| 2026-06-07 00:00 |
21:08:55.17 |
-25:23:38.9 |
HIP 104482 |
17.56 |
| 2026-06-07 12:00 |
21:08:48.93 |
-25:24:55.3 |
HIP 104482 |
18.06 |
| 2026-06-08 00:00 |
21:08:42.47 |
-25:26:12.4 |
HIP 104482 |
18.78 |
| 2026-06-08 12:00 |
21:08:35.78 |
-25:27:30.2 |
HIP 104482 |
19.72 |
| 2026-06-09 00:00 |
21:08:28.86 |
-25:28:48.8 |
HIP 104482 |
20.85 |
| 2026-06-09 12:00 |
21:08:21.72 |
-25:30:08.1 |
HIP 104222 |
20.19 |
| 2026-06-10 00:00 |
21:08:14.36 |
-25:31:28.1 |
HIP 104222 |
18.34 |
| 2026-06-10 12:00 |
21:08:06.77 |
-25:32:48.8 |
HIP 104222 |
16.51 |
| 2026-06-11 00:00 |
21:07:58.96 |
-25:34:10.2 |
HIP 104222 |
14.73 |
| 2026-06-11 12:00 |
21:07:50.92 |
-25:35:32.3 |
HIP 104222 |
13.03 |
| 2026-06-12 00:00 |
21:07:42.66 |
-25:36:55.0 |
HIP 104222 |
11.49 |
| 2026-06-12 12:00 |
21:07:34.18 |
-25:38:18.4 |
HIP 104222 |
10.20 |
| 2026-06-13 00:00 |
21:07:25.47 |
-25:39:42.5 |
HIP 104222 |
9.32 |
| 2026-06-13 12:00 |
21:07:16.54 |
-25:41:07.2 |
HIP 104222 |
8.99 |
| 2026-06-14 00:00 |
21:07:07.39 |
-25:42:32.5 |
HIP 104222 |
9.32 |
| 2026-06-14 12:00 |
21:06:58.02 |
-25:43:58.4 |
HIP 104222 |
10.27 |
| 2026-06-15 00:00 |
21:06:48.43 |
-25:45:24.9 |
HIP 104222 |
11.73 |
| 2026-06-15 12:00 |
21:06:38.63 |
-25:46:52.0 |
HIP 104222 |
13.55 |
| 2026-06-16 00:00 |
21:06:28.60 |
-25:48:19.7 |
HIP 104222 |
15.64 |
| 2026-06-16 12:00 |
21:06:18.35 |
-25:49:47.9 |
HIP 104222 |
17.92 |
| 2026-06-17 00:00 |
21:06:07.89 |
-25:51:16.6 |
HIP 104222 |
20.34 |
| 2026-06-17 12:00 |
21:05:57.22 |
-25:52:45.9 |
HIP 104068 |
20.99 |
| 2026-06-18 00:00 |
21:05:46.33 |
-25:54:15.7 |
HIP 104068 |
18.38 |
| 2026-06-18 12:00 |
21:05:35.23 |
-25:55:46.1 |
HIP 104068 |
15.82 |
| 2026-06-19 00:00 |
21:05:23.91 |
-25:57:16.8 |
HIP 104068 |
13.38 |
| 2026-06-19 12:00 |
21:05:12.39 |
-25:58:48.1 |
HIP 104068 |
11.18 |
| 2026-06-20 00:00 |
21:05:00.65 |
-26:00:19.8 |
HIP 104068 |
9.42 |
| 2026-06-20 12:00 |
21:04:48.71 |
-26:01:52.0 |
HIP 104068 |
8.45 |
| 2026-06-21 00:00 |
21:04:36.56 |
-26:03:24.6 |
HIP 104068 |
8.57 |
| 2026-06-21 12:00 |
21:04:24.20 |
-26:04:57.6 |
HIP 104068 |
9.80 |
| 2026-06-22 00:00 |
21:04:11.65 |
-26:06:30.9 |
HIP 104068 |
11.82 |