메타데이터
| 항목 |
값 |
| Designation |
C/2002 K4 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-07-12T23:22:20.225280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:17Z |
| Obs used |
243 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-07-12.0000000 |
| e |
0.84228241 |
| q (au) |
2.764517 |
| a (au) |
17.528275 |
| i (deg) |
94.062769 |
| Ω (om, deg) |
308.099007 |
| ω (w, deg) |
24.431756 |
| M (ma, deg) |
359.986921 |
밝기
산란 + 전체 선형
$$
M_a = (12.935 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.935 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
08:17:34.03 |
+05:32:48.4 |
HIP 40704 |
26.16 |
| 2026-06-01 12:00 |
08:17:36.27 |
+05:32:47.5 |
HIP 40704 |
25.84 |
| 2026-06-02 00:00 |
08:17:38.54 |
+05:32:46.5 |
HIP 40704 |
25.53 |
| 2026-06-02 12:00 |
08:17:40.83 |
+05:32:45.3 |
HIP 40704 |
25.21 |
| 2026-06-03 00:00 |
08:17:43.14 |
+05:32:43.9 |
HIP 40704 |
24.90 |
| 2026-06-03 12:00 |
08:17:45.48 |
+05:32:42.4 |
HIP 40704 |
24.60 |
| 2026-06-04 00:00 |
08:17:47.83 |
+05:32:40.7 |
HIP 40704 |
24.30 |
| 2026-06-04 12:00 |
08:17:50.22 |
+05:32:38.9 |
HIP 40704 |
24.01 |
| 2026-06-05 00:00 |
08:17:52.62 |
+05:32:36.9 |
HIP 40704 |
23.72 |
| 2026-06-05 12:00 |
08:17:55.05 |
+05:32:34.8 |
HIP 40704 |
23.44 |
| 2026-06-06 00:00 |
08:17:57.50 |
+05:32:32.5 |
HIP 40704 |
23.17 |
| 2026-06-06 12:00 |
08:17:59.98 |
+05:32:30.0 |
HIP 40704 |
22.90 |
| 2026-06-07 00:00 |
08:18:02.47 |
+05:32:27.4 |
HIP 40704 |
22.65 |
| 2026-06-07 12:00 |
08:18:04.99 |
+05:32:24.6 |
HIP 40704 |
22.40 |
| 2026-06-08 00:00 |
08:18:07.53 |
+05:32:21.7 |
HIP 40704 |
22.17 |
| 2026-06-08 12:00 |
08:18:10.09 |
+05:32:18.6 |
HIP 40704 |
21.95 |
| 2026-06-09 00:00 |
08:18:12.67 |
+05:32:15.3 |
HIP 40704 |
21.74 |
| 2026-06-09 12:00 |
08:18:15.28 |
+05:32:11.9 |
HIP 40704 |
21.55 |
| 2026-06-10 00:00 |
08:18:17.90 |
+05:32:08.3 |
HIP 40704 |
21.37 |
| 2026-06-10 12:00 |
08:18:20.55 |
+05:32:04.5 |
HIP 40704 |
21.20 |
| 2026-06-11 00:00 |
08:18:23.22 |
+05:32:00.6 |
HIP 40704 |
21.05 |
| 2026-06-11 12:00 |
08:18:25.91 |
+05:31:56.6 |
HIP 40704 |
20.92 |
| 2026-06-12 00:00 |
08:18:28.62 |
+05:31:52.4 |
HIP 40704 |
20.81 |
| 2026-06-12 12:00 |
08:18:31.35 |
+05:31:48.0 |
HIP 40704 |
20.71 |
| 2026-06-13 00:00 |
08:18:34.09 |
+05:31:43.4 |
HIP 40704 |
20.64 |
| 2026-06-13 12:00 |
08:18:36.86 |
+05:31:38.7 |
HIP 40704 |
20.58 |
| 2026-06-14 00:00 |
08:18:39.65 |
+05:31:33.9 |
HIP 40704 |
20.55 |
| 2026-06-14 12:00 |
08:18:42.46 |
+05:31:28.8 |
HIP 40704 |
20.53 |
| 2026-06-15 00:00 |
08:18:45.29 |
+05:31:23.6 |
HIP 40704 |
20.54 |
| 2026-06-15 12:00 |
08:18:48.14 |
+05:31:18.3 |
HIP 40704 |
20.58 |
| 2026-06-16 00:00 |
08:18:51.00 |
+05:31:12.8 |
HIP 40704 |
20.63 |
| 2026-06-16 12:00 |
08:18:53.88 |
+05:31:07.1 |
HIP 40704 |
20.71 |
| 2026-06-17 00:00 |
08:18:56.79 |
+05:31:01.3 |
HIP 40704 |
20.82 |
| 2026-06-17 12:00 |
08:18:59.71 |
+05:30:55.3 |
HIP 40704 |
20.94 |
| 2026-06-18 00:00 |
08:19:02.64 |
+05:30:49.2 |
HIP 40704 |
21.09 |
| 2026-06-18 12:00 |
08:19:05.60 |
+05:30:42.9 |
HIP 40704 |
21.27 |
| 2026-06-19 00:00 |
08:19:08.57 |
+05:30:36.4 |
HIP 40704 |
21.47 |
| 2026-06-19 12:00 |
08:19:11.56 |
+05:30:29.8 |
HIP 40704 |
21.69 |
| 2026-06-20 00:00 |
08:19:14.57 |
+05:30:23.0 |
HIP 40704 |
21.93 |
| 2026-06-20 12:00 |
08:19:17.59 |
+05:30:16.1 |
HIP 40704 |
22.20 |
| 2026-06-21 00:00 |
08:19:20.63 |
+05:30:09.0 |
HIP 40704 |
22.49 |
| 2026-06-21 12:00 |
08:19:23.69 |
+05:30:01.7 |
HIP 40704 |
22.80 |
| 2026-06-22 00:00 |
08:19:26.76 |
+05:29:54.3 |
HIP 40704 |
23.14 |