메타데이터
| 항목 |
값 |
| Designation |
395P/Catalina-NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-12-30T11:54:17.147520Z |
| Orbit solution date (soln_date, UTC) |
2025-04-09T14:01:13Z |
| Obs used |
810 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-03-31.0000000 |
| e |
0.38213832 |
| q (au) |
4.064893 |
| a (au) |
6.578970 |
| i (deg) |
3.276962 |
| Ω (om, deg) |
223.549119 |
| ω (w, deg) |
89.966129 |
| M (ma, deg) |
5.286093 |
밝기
산란 + 전체 선형
$$
M_a = (8.462 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.462 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.762 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2020-04-26 |
2021-11-28 |
+16.3019 |
-9.562 |
| 2022-06-06 |
2023-10-18 |
+22.4213 |
-14.528 |
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 |
05:38:39.01 |
+21:03:50.4 |
HIP 26451 |
14.84 |
| 2026-06-01 12:00 |
05:38:57.20 |
+21:03:58.9 |
HIP 26451 |
18.87 |
| 2026-06-02 00:00 |
05:39:15.41 |
+21:04:07.3 |
HIP 26684 |
18.89 |
| 2026-06-02 12:00 |
05:39:33.63 |
+21:04:15.4 |
HIP 26684 |
15.98 |
| 2026-06-03 00:00 |
05:39:51.87 |
+21:04:23.4 |
HIP 26684 |
13.78 |
| 2026-06-03 12:00 |
05:40:10.13 |
+21:04:31.2 |
HIP 26684 |
12.67 |
| 2026-06-04 00:00 |
05:40:28.40 |
+21:04:38.8 |
HIP 26684 |
12.95 |
| 2026-06-04 12:00 |
05:40:46.68 |
+21:04:46.2 |
HIP 26696 |
13.89 |
| 2026-06-05 00:00 |
05:41:04.98 |
+21:04:53.5 |
HIP 26696 |
15.86 |
| 2026-06-05 12:00 |
05:41:23.29 |
+21:05:00.6 |
HIP 26696 |
18.61 |
| 2026-06-06 00:00 |
05:41:41.62 |
+21:05:07.5 |
HIP 26696 |
21.86 |
| 2026-06-06 12:00 |
05:41:59.95 |
+21:05:14.2 |
HIP 26912 |
21.38 |
| 2026-06-07 00:00 |
05:42:18.30 |
+21:05:20.7 |
HIP 26912 |
19.35 |
| 2026-06-07 12:00 |
05:42:36.66 |
+21:05:27.1 |
HIP 26912 |
18.12 |
| 2026-06-08 00:00 |
05:42:55.03 |
+21:05:33.2 |
HIP 26912 |
17.86 |
| 2026-06-08 12:00 |
05:43:13.40 |
+21:05:39.2 |
HIP 26912 |
18.61 |
| 2026-06-09 00:00 |
05:43:31.79 |
+21:05:45.0 |
HIP 26967 |
19.35 |
| 2026-06-09 12:00 |
05:43:50.19 |
+21:05:50.6 |
HIP 26967 |
20.21 |
| 2026-06-10 00:00 |
05:44:08.59 |
+21:05:56.1 |
HIP 26967 |
21.91 |
| 2026-06-10 12:00 |
05:44:27.00 |
+21:06:01.3 |
HIP 27120 |
24.20 |
| 2026-06-11 00:00 |
05:44:45.42 |
+21:06:06.3 |
HIP 27214 |
21.35 |
| 2026-06-11 12:00 |
05:45:03.84 |
+21:06:11.2 |
HIP 27214 |
17.76 |
| 2026-06-12 00:00 |
05:45:22.27 |
+21:06:15.9 |
HIP 27214 |
14.56 |
| 2026-06-12 12:00 |
05:45:40.71 |
+21:06:20.4 |
HIP 27214 |
12.06 |
| 2026-06-13 00:00 |
05:45:59.14 |
+21:06:24.7 |
HIP 27214 |
10.77 |
| 2026-06-13 12:00 |
05:46:17.58 |
+21:06:28.8 |
HIP 27214 |
11.12 |
| 2026-06-14 00:00 |
05:46:36.03 |
+21:06:32.7 |
HIP 27214 |
12.97 |
| 2026-06-14 12:00 |
05:46:54.47 |
+21:06:36.4 |
HIP 27214 |
15.80 |
| 2026-06-15 00:00 |
05:47:12.92 |
+21:06:39.9 |
HIP 27214 |
19.20 |
| 2026-06-15 12:00 |
05:47:31.37 |
+21:06:43.3 |
HIP 27421 |
18.80 |
| 2026-06-16 00:00 |
05:47:49.81 |
+21:06:46.4 |
HIP 27421 |
16.46 |
| 2026-06-16 12:00 |
05:48:08.26 |
+21:06:49.4 |
HIP 27421 |
15.02 |
| 2026-06-17 00:00 |
05:48:26.70 |
+21:06:52.1 |
HIP 27486 |
10.83 |
| 2026-06-17 12:00 |
05:48:45.14 |
+21:06:54.7 |
HIP 27486 |
6.57 |
| 2026-06-18 00:00 |
05:49:03.58 |
+21:06:57.1 |
HIP 27486 |
2.47 |
| 2026-06-18 12:00 |
05:49:22.02 |
+21:06:59.3 |
HIP 27486 |
2.45 |
| 2026-06-19 00:00 |
05:49:40.45 |
+21:07:01.3 |
HIP 27486 |
6.55 |
| 2026-06-19 12:00 |
05:49:58.87 |
+21:07:03.1 |
HIP 27495 |
10.11 |
| 2026-06-20 00:00 |
05:50:17.29 |
+21:07:04.7 |
HIP 27495 |
14.06 |
| 2026-06-20 12:00 |
05:50:35.71 |
+21:07:06.1 |
HIP 27495 |
18.17 |
| 2026-06-21 00:00 |
05:50:54.11 |
+21:07:07.3 |
HIP 27495 |
22.35 |
| 2026-06-21 12:00 |
05:51:12.51 |
+21:07:08.4 |
HIP 27785 |
22.26 |
| 2026-06-22 00:00 |
05:51:30.90 |
+21:07:09.2 |
HIP 27785 |
18.02 |