메타데이터
| 항목 |
값 |
| Designation |
189P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-07-25T22:31:20.040960Z |
| Orbit solution date (soln_date, UTC) |
2022-08-26T23:43:11Z |
| Obs used |
1469 |
| NEO |
Yes |
| M1 |
19.100 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-12-04.0000000 |
| e |
0.59764285 |
| q (au) |
1.173925 |
| a (au) |
2.917619 |
| i (deg) |
20.400629 |
| Ω (om, deg) |
282.200061 |
| ω (w, deg) |
15.307418 |
| M (ma, deg) |
98.304051 |
밝기
산란 + 전체 선형
$$
M_a = (19.737 + 2.780\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.737 |
| n |
2.780 |
| gf |
1.000 |
| gb |
-0.866 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
08:38:37.81 |
+03:39:42.3 |
HIP 42493 |
18.43 |
| 2026-05-12 12:00 |
08:38:51.34 |
+03:39:50.3 |
HIP 42493 |
15.42 |
| 2026-05-13 00:00 |
08:39:05.05 |
+03:39:57.1 |
HIP 42493 |
12.55 |
| 2026-05-13 12:00 |
08:39:18.96 |
+03:40:02.8 |
HIP 42493 |
10.00 |
| 2026-05-14 00:00 |
08:39:33.07 |
+03:40:07.3 |
HIP 42493 |
8.11 |
| 2026-05-14 12:00 |
08:39:47.37 |
+03:40:10.7 |
HIP 42493 |
7.49 |
| 2026-05-15 00:00 |
08:40:01.85 |
+03:40:12.9 |
HIP 42493 |
8.48 |
| 2026-05-15 12:00 |
08:40:16.53 |
+03:40:13.9 |
HIP 42493 |
10.69 |
| 2026-05-16 00:00 |
08:40:31.40 |
+03:40:13.8 |
HIP 42493 |
13.58 |
| 2026-05-16 12:00 |
08:40:46.45 |
+03:40:12.5 |
HIP 42493 |
16.82 |
| 2026-05-17 00:00 |
08:41:01.69 |
+03:40:10.0 |
HIP 42493 |
20.28 |
| 2026-05-17 12:00 |
08:41:17.12 |
+03:40:06.4 |
HIP 42493 |
23.88 |
| 2026-05-18 00:00 |
08:41:32.72 |
+03:40:01.6 |
HIP 42493 |
27.59 |
| 2026-05-18 12:00 |
08:41:48.51 |
+03:39:55.6 |
HIP 42799 |
26.57 |
| 2026-05-19 00:00 |
08:42:04.48 |
+03:39:48.4 |
HIP 42799 |
23.43 |
| 2026-05-19 12:00 |
08:42:20.63 |
+03:39:40.1 |
HIP 42799 |
20.54 |
| 2026-05-20 00:00 |
08:42:36.96 |
+03:39:30.6 |
HIP 42799 |
18.06 |
| 2026-05-20 12:00 |
08:42:53.47 |
+03:39:20.0 |
HIP 42799 |
16.20 |
| 2026-05-21 00:00 |
08:43:10.15 |
+03:39:08.1 |
HIP 42799 |
15.24 |
| 2026-05-21 12:00 |
08:43:27.00 |
+03:38:55.1 |
HIP 42799 |
15.37 |
| 2026-05-22 00:00 |
08:43:44.03 |
+03:38:40.9 |
HIP 42799 |
16.61 |
| 2026-05-22 12:00 |
08:44:01.22 |
+03:38:25.6 |
HIP 42827 |
17.96 |
| 2026-05-23 00:00 |
08:44:18.59 |
+03:38:09.0 |
HIP 42827 |
20.17 |
| 2026-05-23 12:00 |
08:44:36.13 |
+03:37:51.3 |
HIP 42827 |
23.05 |
| 2026-05-24 00:00 |
08:44:53.83 |
+03:37:32.5 |
HIP 43075 |
23.22 |
| 2026-05-24 12:00 |
08:45:11.69 |
+03:37:12.5 |
HIP 43075 |
18.78 |
| 2026-05-25 00:00 |
08:45:29.73 |
+03:36:51.3 |
HIP 43075 |
14.33 |
| 2026-05-25 12:00 |
08:45:47.92 |
+03:36:28.9 |
HIP 43075 |
9.88 |
| 2026-05-26 00:00 |
08:46:06.28 |
+03:36:05.4 |
HIP 43075 |
5.55 |
| 2026-05-26 12:00 |
08:46:24.80 |
+03:35:40.7 |
HIP 43075 |
2.51 |
| 2026-05-27 00:00 |
08:46:43.47 |
+03:35:14.8 |
HIP 43075 |
5.01 |
| 2026-05-27 12:00 |
08:47:02.31 |
+03:34:47.8 |
HIP 43075 |
9.40 |
| 2026-05-28 00:00 |
08:47:21.30 |
+03:34:19.6 |
HIP 43075 |
14.04 |
| 2026-05-28 12:00 |
08:47:40.45 |
+03:33:50.3 |
HIP 43075 |
18.78 |
| 2026-05-29 00:00 |
08:47:59.75 |
+03:33:19.8 |
HIP 43271 |
18.21 |
| 2026-05-29 12:00 |
08:48:19.20 |
+03:32:48.2 |
HIP 43297 |
13.84 |
| 2026-05-30 00:00 |
08:48:38.81 |
+03:32:15.4 |
HIP 43297 |
9.01 |
| 2026-05-30 12:00 |
08:48:58.57 |
+03:31:41.4 |
HIP 43297 |
4.37 |
| 2026-05-31 00:00 |
08:49:18.48 |
+03:31:06.3 |
HIP 43297 |
2.50 |
| 2026-05-31 12:00 |
08:49:38.54 |
+03:30:30.0 |
HIP 43297 |
6.62 |
| 2026-06-01 00:00 |
08:49:58.75 |
+03:29:52.6 |
HIP 43297 |
11.54 |
| 2026-06-01 12:00 |
08:50:19.10 |
+03:29:14.0 |
HIP 43297 |
16.59 |
| 2026-06-02 00:00 |
08:50:39.60 |
+03:28:34.2 |
HIP 43297 |
21.71 |