메타데이터
| 항목 |
값 |
| Designation |
C/2003 J1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-10-10T14:30:59.739840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:29Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
11.300 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-07-19.0000000 |
| e |
0.99112756 |
| q (au) |
5.125425 |
| a (au) |
577.679266 |
| i (deg) |
98.313465 |
| Ω (om, deg) |
122.033180 |
| ω (w, deg) |
196.028937 |
| M (ma, deg) |
359.994065 |
밝기
산란 + 전체 선형
$$
M_a = (10.067 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.067 |
| n |
2.000 |
| gf |
0.963 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
9.997 |
| 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 |
08:09:41.67 |
-04:37:38.6 |
HIP 39927 |
7.87 |
| 2026-07-29 12:00 |
08:09:44.44 |
-04:37:45.2 |
HIP 39927 |
8.50 |
| 2026-07-30 00:00 |
08:09:47.21 |
-04:37:52.1 |
HIP 39927 |
9.15 |
| 2026-07-30 12:00 |
08:09:49.97 |
-04:37:59.0 |
HIP 39927 |
9.80 |
| 2026-07-31 00:00 |
08:09:52.74 |
-04:38:06.1 |
HIP 39927 |
10.47 |
| 2026-07-31 12:00 |
08:09:55.50 |
-04:38:13.4 |
HIP 39927 |
11.13 |
| 2026-08-01 00:00 |
08:09:58.25 |
-04:38:20.7 |
HIP 39927 |
11.80 |
| 2026-08-01 12:00 |
08:10:01.00 |
-04:38:28.2 |
HIP 39927 |
12.47 |
| 2026-08-02 00:00 |
08:10:03.75 |
-04:38:35.9 |
HIP 39927 |
13.15 |
| 2026-08-02 12:00 |
08:10:06.50 |
-04:38:43.7 |
HIP 39927 |
13.83 |
| 2026-08-03 00:00 |
08:10:09.24 |
-04:38:51.6 |
HIP 39927 |
14.50 |
| 2026-08-03 12:00 |
08:10:11.98 |
-04:38:59.6 |
HIP 39927 |
15.19 |
| 2026-08-04 00:00 |
08:10:14.71 |
-04:39:07.8 |
HIP 39927 |
15.87 |
| 2026-08-04 12:00 |
08:10:17.44 |
-04:39:16.1 |
HIP 39927 |
16.55 |
| 2026-08-05 00:00 |
08:10:20.16 |
-04:39:24.6 |
HIP 39927 |
17.23 |
| 2026-08-05 12:00 |
08:10:22.88 |
-04:39:33.2 |
HIP 39927 |
17.92 |
| 2026-08-06 00:00 |
08:10:25.59 |
-04:39:41.9 |
HIP 39927 |
18.60 |
| 2026-08-06 12:00 |
08:10:28.30 |
-04:39:50.7 |
HIP 39927 |
19.28 |
| 2026-08-07 00:00 |
08:10:31.01 |
-04:39:59.7 |
HIP 39927 |
19.97 |
| 2026-08-07 12:00 |
08:10:33.71 |
-04:40:08.8 |
HIP 39927 |
20.65 |
| 2026-08-08 00:00 |
08:10:36.40 |
-04:40:18.1 |
HIP 39927 |
21.34 |
| 2026-08-08 12:00 |
08:10:39.08 |
-04:40:27.4 |
HIP 39927 |
22.02 |
| 2026-08-09 00:00 |
08:10:41.76 |
-04:40:36.9 |
HIP 39927 |
22.70 |
| 2026-08-09 12:00 |
08:10:44.44 |
-04:40:46.5 |
HIP 39927 |
23.38 |
| 2026-08-10 00:00 |
08:10:47.11 |
-04:40:56.3 |
HIP 39927 |
24.07 |
| 2026-08-10 12:00 |
08:10:49.77 |
-04:41:06.2 |
HIP 39927 |
24.75 |
| 2026-08-11 00:00 |
08:10:52.42 |
-04:41:16.1 |
HIP 39927 |
25.43 |
| 2026-08-11 12:00 |
08:10:55.07 |
-04:41:26.3 |
HIP 39927 |
26.11 |
| 2026-08-12 00:00 |
08:10:57.71 |
-04:41:36.5 |
HIP 39927 |
26.78 |
| 2026-08-12 12:00 |
08:11:00.34 |
-04:41:46.9 |
HIP 39927 |
27.46 |
| 2026-08-13 00:00 |
08:11:02.97 |
-04:41:57.3 |
HIP 39927 |
28.14 |
| 2026-08-13 12:00 |
08:11:05.58 |
-04:42:07.9 |
HIP 39927 |
28.81 |
| 2026-08-14 00:00 |
08:11:08.19 |
-04:42:18.7 |
HIP 39927 |
29.48 |
| 2026-08-14 12:00 |
08:11:10.79 |
-04:42:29.5 |
HIP 39927 |
30.16 |
| 2026-08-15 00:00 |
08:11:13.38 |
-04:42:40.4 |
HIP 39927 |
30.83 |
| 2026-08-15 12:00 |
08:11:15.97 |
-04:42:51.5 |
HIP 39927 |
31.50 |
| 2026-08-16 00:00 |
08:11:18.54 |
-04:43:02.7 |
HIP 39927 |
32.16 |
| 2026-08-16 12:00 |
08:11:21.11 |
-04:43:14.0 |
HIP 39927 |
32.83 |
| 2026-08-17 00:00 |
08:11:23.67 |
-04:43:25.4 |
HIP 39927 |
33.49 |
| 2026-08-17 12:00 |
08:11:26.22 |
-04:43:36.9 |
HIP 39927 |
34.16 |
| 2026-08-18 00:00 |
08:11:28.75 |
-04:43:48.5 |
HIP 39927 |
34.82 |
| 2026-08-18 12:00 |
08:11:31.28 |
-04:44:00.2 |
HIP 39927 |
35.48 |
| 2026-08-19 00:00 |
08:11:33.80 |
-04:44:12.1 |
HIP 39927 |
36.14 |