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) |
| 2026-03-26 00:00 |
05:05:03.76 |
+20:27:22.6 |
HIP 23587 |
27.11 |
| 2026-03-26 12:00 |
05:05:13.68 |
+20:27:41.1 |
HIP 23587 |
28.36 |
| 2026-03-27 00:00 |
05:05:23.70 |
+20:27:59.6 |
HIP 23587 |
29.76 |
| 2026-03-27 12:00 |
05:05:33.83 |
+20:28:18.2 |
HIP 23587 |
31.29 |
| 2026-03-28 00:00 |
05:05:44.06 |
+20:28:36.8 |
HIP 23871 |
29.34 |
| 2026-03-28 12:00 |
05:05:54.40 |
+20:28:55.5 |
HIP 23871 |
26.98 |
| 2026-03-29 00:00 |
05:06:04.84 |
+20:29:14.2 |
HIP 23871 |
24.61 |
| 2026-03-29 12:00 |
05:06:15.39 |
+20:29:33.0 |
HIP 23871 |
22.24 |
| 2026-03-30 00:00 |
05:06:26.04 |
+20:29:51.9 |
HIP 23871 |
19.88 |
| 2026-03-30 12:00 |
05:06:36.79 |
+20:30:10.8 |
HIP 23871 |
17.53 |
| 2026-03-31 00:00 |
05:06:47.64 |
+20:30:29.8 |
HIP 23871 |
15.22 |
| 2026-03-31 12:00 |
05:06:58.59 |
+20:30:48.8 |
HIP 23871 |
12.99 |
| 2026-04-01 00:00 |
05:07:09.65 |
+20:31:07.8 |
HIP 23871 |
10.90 |
| 2026-04-01 12:00 |
05:07:20.80 |
+20:31:26.9 |
HIP 23871 |
9.06 |
| 2026-04-02 00:00 |
05:07:32.05 |
+20:31:46.0 |
HIP 23871 |
7.69 |
| 2026-04-02 12:00 |
05:07:43.40 |
+20:32:05.2 |
HIP 23871 |
7.08 |
| 2026-04-03 00:00 |
05:07:54.85 |
+20:32:24.4 |
HIP 23871 |
7.45 |
| 2026-04-03 12:00 |
05:08:06.39 |
+20:32:43.6 |
HIP 23871 |
8.70 |
| 2026-04-04 00:00 |
05:08:18.03 |
+20:33:02.9 |
HIP 23871 |
10.54 |
| 2026-04-04 12:00 |
05:08:29.77 |
+20:33:22.2 |
HIP 23963 |
8.24 |
| 2026-04-05 00:00 |
05:08:41.60 |
+20:33:41.5 |
HIP 23963 |
5.80 |
| 2026-04-05 12:00 |
05:08:53.52 |
+20:34:00.8 |
HIP 23963 |
3.85 |
| 2026-04-06 00:00 |
05:09:05.54 |
+20:34:20.2 |
HIP 23963 |
3.44 |
| 2026-04-06 12:00 |
05:09:17.65 |
+20:34:39.6 |
HIP 23963 |
5.00 |
| 2026-04-07 00:00 |
05:09:29.86 |
+20:34:59.0 |
HIP 23963 |
7.40 |
| 2026-04-07 12:00 |
05:09:42.15 |
+20:35:18.4 |
HIP 23963 |
10.07 |
| 2026-04-08 00:00 |
05:09:54.54 |
+20:35:37.8 |
HIP 24116 |
12.48 |
| 2026-04-08 12:00 |
05:10:07.01 |
+20:35:57.2 |
HIP 24116 |
9.65 |
| 2026-04-09 00:00 |
05:10:19.58 |
+20:36:16.6 |
HIP 24116 |
6.87 |
| 2026-04-09 12:00 |
05:10:32.24 |
+20:36:36.1 |
HIP 24116 |
4.33 |
| 2026-04-10 00:00 |
05:10:44.98 |
+20:36:55.5 |
HIP 24116 |
2.83 |
| 2026-04-10 12:00 |
05:10:57.81 |
+20:37:14.9 |
HIP 24116 |
3.92 |
| 2026-04-11 00:00 |
05:11:10.73 |
+20:37:34.3 |
HIP 24116 |
6.42 |
| 2026-04-11 12:00 |
05:11:23.73 |
+20:37:53.8 |
HIP 24116 |
9.27 |
| 2026-04-12 00:00 |
05:11:36.83 |
+20:38:13.2 |
HIP 24116 |
12.24 |
| 2026-04-12 12:00 |
05:11:50.00 |
+20:38:32.6 |
HIP 24116 |
15.27 |
| 2026-04-13 00:00 |
05:12:03.26 |
+20:38:52.0 |
HIP 24116 |
18.34 |
| 2026-04-13 12:00 |
05:12:16.61 |
+20:39:11.3 |
HIP 24116 |
21.45 |
| 2026-04-14 00:00 |
05:12:30.04 |
+20:39:30.7 |
HIP 24116 |
24.58 |
| 2026-04-14 12:00 |
05:12:43.55 |
+20:39:50.0 |
HIP 24116 |
27.74 |
| 2026-04-15 00:00 |
05:12:57.14 |
+20:40:09.3 |
HIP 24456 |
29.19 |
| 2026-04-15 12:00 |
05:13:10.81 |
+20:40:28.6 |
HIP 24456 |
26.19 |
| 2026-04-16 00:00 |
05:13:24.57 |
+20:40:47.9 |
HIP 24456 |
23.24 |