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
$$
M_a = (8.306 + 3.356\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.306 |
| n |
3.356 |
| gf |
0.883 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
4.130 |
| 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) |
| 2026-07-29 00:00 |
07:26:38.78 |
-19:11:26.5 |
HIP 36275 |
20.89 |
| 2026-07-29 12:00 |
07:26:41.73 |
-19:11:36.1 |
HIP 36275 |
20.25 |
| 2026-07-30 00:00 |
07:26:44.66 |
-19:11:45.8 |
HIP 36275 |
19.61 |
| 2026-07-30 12:00 |
07:26:47.59 |
-19:11:55.8 |
HIP 36275 |
18.98 |
| 2026-07-31 00:00 |
07:26:50.52 |
-19:12:06.0 |
HIP 36275 |
18.36 |
| 2026-07-31 12:00 |
07:26:53.43 |
-19:12:16.4 |
HIP 36275 |
17.75 |
| 2026-08-01 00:00 |
07:26:56.34 |
-19:12:27.0 |
HIP 36275 |
17.15 |
| 2026-08-01 12:00 |
07:26:59.24 |
-19:12:37.8 |
HIP 36275 |
16.55 |
| 2026-08-02 00:00 |
07:27:02.14 |
-19:12:48.8 |
HIP 36275 |
15.98 |
| 2026-08-02 12:00 |
07:27:05.02 |
-19:13:00.0 |
HIP 36275 |
15.41 |
| 2026-08-03 00:00 |
07:27:07.90 |
-19:13:11.4 |
HIP 36275 |
14.87 |
| 2026-08-03 12:00 |
07:27:10.77 |
-19:13:23.0 |
HIP 36275 |
14.33 |
| 2026-08-04 00:00 |
07:27:13.63 |
-19:13:34.8 |
HIP 36275 |
13.82 |
| 2026-08-04 12:00 |
07:27:16.48 |
-19:13:46.8 |
HIP 36275 |
13.33 |
| 2026-08-05 00:00 |
07:27:19.32 |
-19:13:59.0 |
HIP 36275 |
12.86 |
| 2026-08-05 12:00 |
07:27:22.16 |
-19:14:11.4 |
HIP 36275 |
12.42 |
| 2026-08-06 00:00 |
07:27:24.98 |
-19:14:24.0 |
HIP 36275 |
12.00 |
| 2026-08-06 12:00 |
07:27:27.80 |
-19:14:36.8 |
HIP 36275 |
11.62 |
| 2026-08-07 00:00 |
07:27:30.60 |
-19:14:49.8 |
HIP 36275 |
11.27 |
| 2026-08-07 12:00 |
07:27:33.40 |
-19:15:03.0 |
HIP 36275 |
10.96 |
| 2026-08-08 00:00 |
07:27:36.19 |
-19:15:16.3 |
HIP 36275 |
10.69 |
| 2026-08-08 12:00 |
07:27:38.96 |
-19:15:29.9 |
HIP 36275 |
10.46 |
| 2026-08-09 00:00 |
07:27:41.73 |
-19:15:43.7 |
HIP 36275 |
10.28 |
| 2026-08-09 12:00 |
07:27:44.48 |
-19:15:57.6 |
HIP 36275 |
10.14 |
| 2026-08-10 00:00 |
07:27:47.23 |
-19:16:11.8 |
HIP 36275 |
10.06 |
| 2026-08-10 12:00 |
07:27:49.96 |
-19:16:26.1 |
HIP 36275 |
10.02 |
| 2026-08-11 00:00 |
07:27:52.69 |
-19:16:40.6 |
HIP 36275 |
10.04 |
| 2026-08-11 12:00 |
07:27:55.40 |
-19:16:55.3 |
HIP 36275 |
10.11 |
| 2026-08-12 00:00 |
07:27:58.10 |
-19:17:10.2 |
HIP 36275 |
10.22 |
| 2026-08-12 12:00 |
07:28:00.79 |
-19:17:25.3 |
HIP 36275 |
10.39 |
| 2026-08-13 00:00 |
07:28:03.46 |
-19:17:40.6 |
HIP 36275 |
10.60 |
| 2026-08-13 12:00 |
07:28:06.13 |
-19:17:56.0 |
HIP 36275 |
10.85 |
| 2026-08-14 00:00 |
07:28:08.78 |
-19:18:11.6 |
HIP 36275 |
11.13 |
| 2026-08-14 12:00 |
07:28:11.42 |
-19:18:27.4 |
HIP 36275 |
11.46 |
| 2026-08-15 00:00 |
07:28:14.05 |
-19:18:43.4 |
HIP 36275 |
11.82 |
| 2026-08-15 12:00 |
07:28:16.67 |
-19:18:59.6 |
HIP 36275 |
12.20 |
| 2026-08-16 00:00 |
07:28:19.27 |
-19:19:15.9 |
HIP 36275 |
12.61 |
| 2026-08-16 12:00 |
07:28:21.86 |
-19:19:32.4 |
HIP 36275 |
13.05 |
| 2026-08-17 00:00 |
07:28:24.43 |
-19:19:49.1 |
HIP 36275 |
13.51 |
| 2026-08-17 12:00 |
07:28:27.00 |
-19:20:05.9 |
HIP 36275 |
13.98 |
| 2026-08-18 00:00 |
07:28:29.54 |
-19:20:22.9 |
HIP 36275 |
14.47 |
| 2026-08-18 12:00 |
07:28:32.08 |
-19:20:40.1 |
HIP 36275 |
14.98 |
| 2026-08-19 00:00 |
07:28:34.60 |
-19:20:57.5 |
HIP 36275 |
15.50 |