메타데이터
| 항목 |
값 |
| Designation |
169P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-11-30T07:18:34.346880Z |
| Orbit solution date (soln_date, UTC) |
2025-05-08T09:42:28Z |
| Obs used |
1332 |
| NEO |
Yes |
| M1 |
16.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-11-01.0000000 |
| e |
0.76678672 |
| q (au) |
0.607749 |
| a (au) |
2.605977 |
| i (deg) |
11.299757 |
| Ω (om, deg) |
176.191241 |
| ω (w, deg) |
217.958974 |
| M (ma, deg) |
353.134322 |
밝기
산란 + 전체 선형
$$
M_a = (15.263 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.263 |
| n |
2.000 |
| gf |
0.945 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
7.550 |
| 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 |
19:27:40.32 |
-04:45:33.3 |
HIP 95698 |
4.58 |
| 2026-05-12 12:00 |
19:27:59.55 |
-04:39:43.1 |
HIP 95698 |
9.53 |
| 2026-05-13 00:00 |
19:28:18.49 |
-04:33:50.3 |
HIP 95698 |
16.58 |
| 2026-05-13 12:00 |
19:28:37.15 |
-04:27:55.1 |
HIP 95817 |
12.02 |
| 2026-05-14 00:00 |
19:28:55.52 |
-04:21:57.3 |
HIP 95817 |
6.26 |
| 2026-05-14 12:00 |
19:29:13.60 |
-04:15:57.0 |
HIP 95817 |
6.92 |
| 2026-05-15 00:00 |
19:29:31.38 |
-04:09:54.1 |
HIP 95817 |
13.03 |
| 2026-05-15 12:00 |
19:29:48.87 |
-04:03:48.6 |
HIP 95817 |
20.13 |
| 2026-05-16 00:00 |
19:30:06.05 |
-03:57:40.5 |
HIP 96027 |
20.59 |
| 2026-05-16 12:00 |
19:30:22.93 |
-03:51:29.8 |
HIP 96027 |
16.26 |
| 2026-05-17 00:00 |
19:30:39.50 |
-03:45:16.4 |
HIP 96027 |
14.80 |
| 2026-05-17 12:00 |
19:30:55.76 |
-03:39:00.4 |
HIP 96027 |
16.98 |
| 2026-05-18 00:00 |
19:31:11.70 |
-03:32:41.7 |
HIP 96027 |
21.70 |
| 2026-05-18 12:00 |
19:31:27.32 |
-03:26:20.2 |
HIP 95909 |
23.26 |
| 2026-05-19 00:00 |
19:31:42.62 |
-03:19:56.0 |
HIP 95909 |
23.08 |
| 2026-05-19 12:00 |
19:31:57.59 |
-03:13:29.0 |
HIP 95909 |
25.12 |
| 2026-05-20 00:00 |
19:32:12.23 |
-03:06:59.2 |
HIP 95909 |
28.91 |
| 2026-05-20 12:00 |
19:32:26.54 |
-03:00:26.6 |
HIP 95937 |
29.70 |
| 2026-05-21 00:00 |
19:32:40.51 |
-02:53:51.2 |
HIP 95937 |
30.83 |
| 2026-05-21 12:00 |
19:32:54.14 |
-02:47:12.8 |
HIP 95937 |
33.54 |
| 2026-05-22 00:00 |
19:33:07.42 |
-02:40:31.6 |
HIP 95937 |
37.48 |
| 2026-05-22 12:00 |
19:33:20.36 |
-02:33:47.4 |
HIP 96325 |
34.24 |
| 2026-05-23 00:00 |
19:33:32.94 |
-02:27:00.2 |
HIP 96325 |
27.65 |
| 2026-05-23 12:00 |
19:33:45.17 |
-02:20:10.0 |
HIP 96325 |
21.71 |
| 2026-05-24 00:00 |
19:33:57.03 |
-02:13:16.7 |
HIP 96325 |
17.12 |
| 2026-05-24 12:00 |
19:34:08.53 |
-02:06:20.4 |
HIP 96325 |
15.18 |
| 2026-05-25 00:00 |
19:34:19.66 |
-01:59:20.9 |
HIP 96325 |
16.85 |
| 2026-05-25 12:00 |
19:34:30.42 |
-01:52:18.3 |
HIP 96325 |
21.31 |
| 2026-05-26 00:00 |
19:34:40.79 |
-01:45:12.4 |
HIP 96325 |
27.25 |
| 2026-05-26 12:00 |
19:34:50.78 |
-01:38:03.4 |
HIP 96325 |
33.90 |
| 2026-05-27 00:00 |
19:35:00.39 |
-01:30:51.0 |
HIP 96468 |
29.12 |
| 2026-05-27 12:00 |
19:35:09.60 |
-01:23:35.4 |
HIP 96468 |
24.27 |
| 2026-05-28 00:00 |
19:35:18.40 |
-01:16:16.3 |
HIP 96468 |
21.23 |
| 2026-05-28 12:00 |
19:35:26.81 |
-01:08:53.9 |
HIP 96468 |
20.83 |
| 2026-05-29 00:00 |
19:35:34.80 |
-01:01:28.0 |
HIP 96468 |
23.24 |
| 2026-05-29 12:00 |
19:35:42.38 |
-00:53:58.6 |
HIP 96468 |
27.76 |
| 2026-05-30 00:00 |
19:35:49.53 |
-00:46:25.8 |
HIP 96535 |
30.42 |
| 2026-05-30 12:00 |
19:35:56.26 |
-00:38:49.3 |
HIP 96379 |
24.61 |
| 2026-05-31 00:00 |
19:36:02.55 |
-00:31:09.2 |
HIP 96379 |
17.34 |
| 2026-05-31 12:00 |
19:36:08.40 |
-00:23:25.4 |
HIP 96379 |
10.78 |
| 2026-06-01 00:00 |
19:36:13.80 |
-00:15:37.9 |
HIP 96379 |
7.33 |
| 2026-06-01 12:00 |
19:36:18.75 |
-00:07:46.7 |
HIP 96379 |
10.73 |
| 2026-06-02 00:00 |
19:36:23.24 |
+00:00:08.4 |
HIP 96402 |
7.80 |