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) |
| 2026-09-20 00:00 |
08:29:13.86 |
+04:35:12.2 |
HIP 41605 |
14.09 |
| 2026-09-20 12:00 |
08:29:16.04 |
+04:34:48.1 |
HIP 41605 |
14.65 |
| 2026-09-21 00:00 |
08:29:18.21 |
+04:34:24.1 |
HIP 41605 |
15.23 |
| 2026-09-21 12:00 |
08:29:20.34 |
+04:34:00.0 |
HIP 41605 |
15.80 |
| 2026-09-22 00:00 |
08:29:22.45 |
+04:33:36.0 |
HIP 41605 |
16.39 |
| 2026-09-22 12:00 |
08:29:24.54 |
+04:33:11.9 |
HIP 41605 |
16.97 |
| 2026-09-23 00:00 |
08:29:26.60 |
+04:32:47.9 |
HIP 41605 |
17.56 |
| 2026-09-23 12:00 |
08:29:28.63 |
+04:32:23.9 |
HIP 41605 |
18.14 |
| 2026-09-24 00:00 |
08:29:30.64 |
+04:31:59.9 |
HIP 41605 |
18.73 |
| 2026-09-24 12:00 |
08:29:32.62 |
+04:31:35.9 |
HIP 41605 |
19.32 |
| 2026-09-25 00:00 |
08:29:34.58 |
+04:31:11.9 |
HIP 41605 |
19.91 |
| 2026-09-25 12:00 |
08:29:36.51 |
+04:30:48.0 |
HIP 41605 |
20.50 |
| 2026-09-26 00:00 |
08:29:38.41 |
+04:30:24.1 |
HIP 41605 |
21.08 |
| 2026-09-26 12:00 |
08:29:40.29 |
+04:30:00.2 |
HIP 41605 |
21.66 |
| 2026-09-27 00:00 |
08:29:42.14 |
+04:29:36.3 |
HIP 41605 |
22.25 |
| 2026-09-27 12:00 |
08:29:43.96 |
+04:29:12.4 |
HIP 41605 |
22.82 |
| 2026-09-28 00:00 |
08:29:45.76 |
+04:28:48.6 |
HIP 41605 |
23.40 |
| 2026-09-28 12:00 |
08:29:47.52 |
+04:28:24.8 |
HIP 41705 |
23.81 |
| 2026-09-29 00:00 |
08:29:49.27 |
+04:28:01.0 |
HIP 41705 |
23.30 |
| 2026-09-29 12:00 |
08:29:50.98 |
+04:27:37.3 |
HIP 41705 |
22.80 |
| 2026-09-30 00:00 |
08:29:52.67 |
+04:27:13.5 |
HIP 41705 |
22.31 |
| 2026-09-30 12:00 |
08:29:54.32 |
+04:26:49.8 |
HIP 41705 |
21.82 |
| 2026-10-01 00:00 |
08:29:55.95 |
+04:26:26.2 |
HIP 41705 |
21.34 |
| 2026-10-01 12:00 |
08:29:57.56 |
+04:26:02.6 |
HIP 41705 |
20.86 |
| 2026-10-02 00:00 |
08:29:59.13 |
+04:25:39.0 |
HIP 41705 |
20.39 |
| 2026-10-02 12:00 |
08:30:00.67 |
+04:25:15.4 |
HIP 41705 |
19.93 |
| 2026-10-03 00:00 |
08:30:02.19 |
+04:24:51.9 |
HIP 41705 |
19.47 |
| 2026-10-03 12:00 |
08:30:03.68 |
+04:24:28.4 |
HIP 41705 |
19.02 |
| 2026-10-04 00:00 |
08:30:05.14 |
+04:24:05.0 |
HIP 41705 |
18.58 |
| 2026-10-04 12:00 |
08:30:06.57 |
+04:23:41.6 |
HIP 41705 |
18.14 |
| 2026-10-05 00:00 |
08:30:07.97 |
+04:23:18.3 |
HIP 41705 |
17.71 |
| 2026-10-05 12:00 |
08:30:09.34 |
+04:22:55.0 |
HIP 41705 |
17.29 |
| 2026-10-06 00:00 |
08:30:10.68 |
+04:22:31.7 |
HIP 41705 |
16.87 |
| 2026-10-06 12:00 |
08:30:11.99 |
+04:22:08.5 |
HIP 41705 |
16.46 |
| 2026-10-07 00:00 |
08:30:13.27 |
+04:21:45.4 |
HIP 41705 |
16.05 |
| 2026-10-07 12:00 |
08:30:14.52 |
+04:21:22.3 |
HIP 41705 |
15.66 |
| 2026-10-08 00:00 |
08:30:15.74 |
+04:20:59.2 |
HIP 41705 |
15.27 |
| 2026-10-08 12:00 |
08:30:16.93 |
+04:20:36.2 |
HIP 41705 |
14.88 |
| 2026-10-09 00:00 |
08:30:18.09 |
+04:20:13.3 |
HIP 41705 |
14.51 |
| 2026-10-09 12:00 |
08:30:19.22 |
+04:19:50.4 |
HIP 41705 |
14.14 |
| 2026-10-10 00:00 |
08:30:20.32 |
+04:19:27.6 |
HIP 41705 |
13.77 |
| 2026-10-10 12:00 |
08:30:21.39 |
+04:19:04.8 |
HIP 41705 |
13.42 |
| 2026-10-11 00:00 |
08:30:22.42 |
+04:18:42.1 |
HIP 41705 |
13.07 |