메타데이터
| 항목 |
값 |
| Designation |
163P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-02-01T08:29:40.407360Z |
| Orbit solution date (soln_date, UTC) |
2021-09-22T15:34:14Z |
| Obs used |
355 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
19.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-11-20.0000000 |
| e |
0.47602079 |
| q (au) |
1.928340 |
| a (au) |
3.680184 |
| i (deg) |
12.504636 |
| Ω (om, deg) |
103.347360 |
| ω (w, deg) |
348.053059 |
| M (ma, deg) |
91.670806 |
밝기
산란 + 전체 선형
$$
M_a = (19.805 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.805 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.678 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
00:53:12.15 |
-04:28:12.0 |
HIP 4207 |
7.99 |
| 2026-03-26 12:00 |
00:53:59.07 |
-04:22:57.0 |
HIP 4207 |
9.66 |
| 2026-03-27 00:00 |
00:54:46.06 |
-04:17:42.0 |
HIP 4207 |
21.26 |
| 2026-03-27 12:00 |
00:55:33.11 |
-04:12:27.1 |
HIP 4345 |
13.06 |
| 2026-03-28 00:00 |
00:56:20.23 |
-04:07:12.1 |
HIP 4345 |
12.24 |
| 2026-03-28 12:00 |
00:57:07.40 |
-04:01:57.3 |
HIP 4516 |
17.06 |
| 2026-03-29 00:00 |
00:57:54.64 |
-03:56:42.4 |
HIP 4516 |
17.94 |
| 2026-03-29 12:00 |
00:58:41.95 |
-03:51:27.6 |
HIP 4516 |
26.18 |
| 2026-03-30 00:00 |
00:59:29.32 |
-03:46:12.8 |
HIP 4648 |
33.23 |
| 2026-03-30 12:00 |
01:00:16.75 |
-03:40:58.1 |
HIP 4808 |
22.10 |
| 2026-03-31 00:00 |
01:01:04.24 |
-03:35:43.5 |
HIP 4808 |
9.70 |
| 2026-03-31 12:00 |
01:01:51.79 |
-03:30:28.9 |
HIP 4808 |
5.97 |
| 2026-04-01 00:00 |
01:02:39.41 |
-03:25:14.4 |
HIP 4808 |
17.73 |
| 2026-04-01 12:00 |
01:03:27.10 |
-03:20:00.0 |
HIP 4936 |
28.80 |
| 2026-04-02 00:00 |
01:04:14.84 |
-03:14:45.5 |
HIP 5102 |
19.11 |
| 2026-04-02 12:00 |
01:05:02.65 |
-03:09:31.2 |
HIP 5102 |
14.48 |
| 2026-04-03 00:00 |
01:05:50.52 |
-03:04:17.0 |
HIP 5102 |
19.85 |
| 2026-04-03 12:00 |
01:06:38.46 |
-02:59:02.9 |
HIP 5290 |
21.36 |
| 2026-04-04 00:00 |
01:07:26.46 |
-02:53:48.9 |
HIP 5290 |
9.95 |
| 2026-04-04 12:00 |
01:08:14.52 |
-02:48:34.9 |
HIP 5290 |
9.15 |
| 2026-04-05 00:00 |
01:09:02.64 |
-02:43:21.1 |
HIP 5405 |
9.98 |
| 2026-04-05 12:00 |
01:09:50.83 |
-02:38:07.4 |
HIP 5405 |
18.10 |
| 2026-04-06 00:00 |
01:10:39.08 |
-02:32:53.7 |
HIP 5594 |
24.03 |
| 2026-04-06 12:00 |
01:11:27.40 |
-02:27:40.2 |
HIP 5594 |
13.24 |
| 2026-04-07 00:00 |
01:12:15.77 |
-02:22:26.9 |
HIP 5594 |
10.93 |
| 2026-04-07 12:00 |
01:13:04.22 |
-02:17:13.6 |
HIP 5704 |
16.51 |
| 2026-04-08 00:00 |
01:13:52.72 |
-02:12:00.5 |
HIP 5771 |
5.97 |
| 2026-04-08 12:00 |
01:14:41.29 |
-02:06:47.5 |
HIP 5771 |
9.12 |
| 2026-04-09 00:00 |
01:15:29.92 |
-02:01:34.7 |
HIP 5771 |
21.92 |
| 2026-04-09 12:00 |
01:16:18.62 |
-01:56:22.1 |
HIP 5956 |
19.12 |
| 2026-04-10 00:00 |
01:17:07.37 |
-01:51:09.5 |
HIP 5956 |
15.15 |
| 2026-04-10 12:00 |
01:17:56.20 |
-01:45:57.2 |
HIP 5956 |
21.10 |
| 2026-04-11 00:00 |
01:18:45.08 |
-01:40:45.0 |
HIP 5956 |
31.84 |
| 2026-04-11 12:00 |
01:19:34.03 |
-01:35:33.0 |
HIP 6302 |
26.00 |
| 2026-04-12 00:00 |
01:20:23.04 |
-01:30:21.2 |
HIP 6302 |
13.91 |
| 2026-04-12 12:00 |
01:21:12.11 |
-01:25:09.5 |
HIP 6302 |
8.08 |
| 2026-04-13 00:00 |
01:22:01.25 |
-01:19:58.1 |
HIP 6302 |
17.09 |
| 2026-04-13 12:00 |
01:22:50.45 |
-01:14:46.9 |
HIP 6302 |
29.59 |
| 2026-04-14 00:00 |
01:23:39.71 |
-01:09:35.8 |
HIP 6593 |
19.12 |
| 2026-04-14 12:00 |
01:24:29.04 |
-01:04:25.0 |
HIP 6593 |
6.90 |
| 2026-04-15 00:00 |
01:25:18.42 |
-00:59:14.4 |
HIP 6639 |
4.83 |
| 2026-04-15 12:00 |
01:26:07.87 |
-00:54:04.0 |
HIP 6639 |
17.37 |
| 2026-04-16 00:00 |
01:26:57.38 |
-00:48:53.9 |
HIP 6715 |
23.66 |