C/2001 Q1 (NEAT)
메타데이터
| 항목 |
값 |
| Designation |
C/2001 Q1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-09-20T20:53:33.852480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:10Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2001-09-28.0000000 |
| e |
0.96593590 |
| q (au) |
5.833970 |
| a (au) |
171.264460 |
| i (deg) |
66.950479 |
| Ω (om, deg) |
139.261335 |
| ω (w, deg) |
175.461635 |
| M (ma, deg) |
0.003135 |
밝기
산란 + 전체 선형
$$
M_a = (8.300 + 3.360\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.300 |
| n |
3.360 |
| gf |
0.882 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
4.098 |
| 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) |
| 2026-02-03 00:00 |
07:21:34.66 |
-21:05:52.8 |
HIP 35610 |
28.55 |
| 2026-02-03 12:00 |
07:21:31.96 |
-21:05:33.1 |
HIP 35610 |
28.04 |
| 2026-02-04 00:00 |
07:21:29.27 |
-21:05:13.1 |
HIP 35610 |
27.53 |
| 2026-02-04 12:00 |
07:21:26.60 |
-21:04:52.8 |
HIP 35610 |
27.02 |
| 2026-02-05 00:00 |
07:21:23.94 |
-21:04:32.4 |
HIP 35610 |
26.53 |
| 2026-02-05 12:00 |
07:21:21.29 |
-21:04:11.7 |
HIP 35610 |
26.04 |
| 2026-02-06 00:00 |
07:21:18.66 |
-21:03:50.8 |
HIP 35610 |
25.55 |
| 2026-02-06 12:00 |
07:21:16.04 |
-21:03:29.7 |
HIP 35610 |
25.08 |
| 2026-02-07 00:00 |
07:21:13.43 |
-21:03:08.4 |
HIP 35610 |
24.61 |
| 2026-02-07 12:00 |
07:21:10.84 |
-21:02:46.9 |
HIP 35610 |
24.16 |
| 2026-02-08 00:00 |
07:21:08.26 |
-21:02:25.2 |
HIP 35610 |
23.71 |
| 2026-02-08 12:00 |
07:21:05.70 |
-21:02:03.2 |
HIP 35610 |
23.27 |
| 2026-02-09 00:00 |
07:21:03.15 |
-21:01:41.1 |
HIP 35610 |
22.84 |
| 2026-02-09 12:00 |
07:21:00.62 |
-21:01:18.7 |
HIP 35610 |
22.42 |
| 2026-02-10 00:00 |
07:20:58.10 |
-21:00:56.2 |
HIP 35610 |
22.01 |
| 2026-02-10 12:00 |
07:20:55.59 |
-21:00:33.4 |
HIP 35610 |
21.61 |
| 2026-02-11 00:00 |
07:20:53.11 |
-21:00:10.4 |
HIP 35544 |
21.18 |
| 2026-02-11 12:00 |
07:20:50.63 |
-20:59:47.2 |
HIP 35544 |
20.55 |
| 2026-02-12 00:00 |
07:20:48.18 |
-20:59:23.9 |
HIP 35544 |
19.92 |
| 2026-02-12 12:00 |
07:20:45.74 |
-20:59:00.3 |
HIP 35544 |
19.30 |
| 2026-02-13 00:00 |
07:20:43.31 |
-20:58:36.5 |
HIP 35544 |
18.68 |
| 2026-02-13 12:00 |
07:20:40.91 |
-20:58:12.6 |
HIP 35544 |
18.06 |
| 2026-02-14 00:00 |
07:20:38.52 |
-20:57:48.4 |
HIP 35544 |
17.44 |
| 2026-02-14 12:00 |
07:20:36.15 |
-20:57:24.1 |
HIP 35544 |
16.83 |
| 2026-02-15 00:00 |
07:20:33.79 |
-20:56:59.6 |
HIP 35544 |
16.23 |
| 2026-02-15 12:00 |
07:20:31.45 |
-20:56:34.9 |
HIP 35544 |
15.63 |
| 2026-02-16 00:00 |
07:20:29.13 |
-20:56:10.0 |
HIP 35544 |
15.04 |
| 2026-02-16 12:00 |
07:20:26.83 |
-20:55:44.9 |
HIP 35544 |
14.45 |
| 2026-02-17 00:00 |
07:20:24.54 |
-20:55:19.7 |
HIP 35544 |
13.87 |
| 2026-02-17 12:00 |
07:20:22.28 |
-20:54:54.2 |
HIP 35544 |
13.30 |
| 2026-02-18 00:00 |
07:20:20.03 |
-20:54:28.6 |
HIP 35544 |
12.74 |
| 2026-02-18 12:00 |
07:20:17.80 |
-20:54:02.8 |
HIP 35544 |
12.19 |
| 2026-02-19 00:00 |
07:20:15.59 |
-20:53:36.9 |
HIP 35544 |
11.65 |
| 2026-02-19 12:00 |
07:20:13.40 |
-20:53:10.8 |
HIP 35544 |
11.12 |
| 2026-02-20 00:00 |
07:20:11.23 |
-20:52:44.5 |
HIP 35544 |
10.60 |
| 2026-02-20 12:00 |
07:20:09.08 |
-20:52:18.0 |
HIP 35544 |
10.11 |
| 2026-02-21 00:00 |
07:20:06.94 |
-20:51:51.4 |
HIP 35544 |
9.63 |
| 2026-02-21 12:00 |
07:20:04.83 |
-20:51:24.7 |
HIP 35544 |
9.17 |
| 2026-02-22 00:00 |
07:20:02.74 |
-20:50:57.7 |
HIP 35544 |
8.73 |
| 2026-02-22 12:00 |
07:20:00.67 |
-20:50:30.7 |
HIP 35544 |
8.32 |
| 2026-02-23 00:00 |
07:19:58.61 |
-20:50:03.4 |
HIP 35544 |
7.95 |
| 2026-02-23 12:00 |
07:19:56.58 |
-20:49:36.0 |
HIP 35544 |
7.60 |
| 2026-02-24 00:00 |
07:19:54.57 |
-20:49:08.5 |
HIP 35544 |
7.30 |