메타데이터
| 항목 |
값 |
| Designation |
C/2003 H3 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-04-24T05:32:24.740160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:29Z |
| Obs used |
765 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
5.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-08-01.0000000 |
| e |
0.99978175 |
| q (au) |
2.901439 |
| a (au) |
13294.090063 |
| i (deg) |
42.811675 |
| Ω (om, deg) |
269.417235 |
| ω (w, deg) |
6.477416 |
| M (ma, deg) |
0.000064 |
밝기
산란 + 전체 선형
$$
M_a = (13.461 + 2.567\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.461 |
| n |
2.567 |
| gf |
1.000 |
| gb |
-0.709 |
| k |
0.800 |
| 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) |
| 2026-03-26 00:00 |
04:23:12.95 |
+37:30:40.9 |
HIP 20452 |
26.68 |
| 2026-03-26 12:00 |
04:23:14.67 |
+37:30:32.6 |
HIP 20452 |
26.87 |
| 2026-03-27 00:00 |
04:23:16.42 |
+37:30:24.4 |
HIP 20452 |
27.06 |
| 2026-03-27 12:00 |
04:23:18.19 |
+37:30:16.2 |
HIP 20452 |
27.25 |
| 2026-03-28 00:00 |
04:23:19.99 |
+37:30:08.2 |
HIP 20452 |
27.45 |
| 2026-03-28 12:00 |
04:23:21.81 |
+37:30:00.3 |
HIP 20452 |
27.65 |
| 2026-03-29 00:00 |
04:23:23.66 |
+37:29:52.4 |
HIP 20452 |
27.85 |
| 2026-03-29 12:00 |
04:23:25.53 |
+37:29:44.7 |
HIP 20452 |
28.06 |
| 2026-03-30 00:00 |
04:23:27.43 |
+37:29:37.1 |
HIP 20653 |
27.91 |
| 2026-03-30 12:00 |
04:23:29.35 |
+37:29:29.5 |
HIP 20653 |
27.51 |
| 2026-03-31 00:00 |
04:23:31.29 |
+37:29:22.1 |
HIP 20653 |
27.11 |
| 2026-03-31 12:00 |
04:23:33.26 |
+37:29:14.7 |
HIP 20653 |
26.71 |
| 2026-04-01 00:00 |
04:23:35.25 |
+37:29:07.5 |
HIP 20653 |
26.31 |
| 2026-04-01 12:00 |
04:23:37.26 |
+37:29:00.3 |
HIP 20653 |
25.90 |
| 2026-04-02 00:00 |
04:23:39.30 |
+37:28:53.3 |
HIP 20653 |
25.49 |
| 2026-04-02 12:00 |
04:23:41.36 |
+37:28:46.3 |
HIP 20653 |
25.08 |
| 2026-04-03 00:00 |
04:23:43.44 |
+37:28:39.5 |
HIP 20653 |
24.66 |
| 2026-04-03 12:00 |
04:23:45.55 |
+37:28:32.8 |
HIP 20653 |
24.24 |
| 2026-04-04 00:00 |
04:23:47.68 |
+37:28:26.1 |
HIP 20653 |
23.82 |
| 2026-04-04 12:00 |
04:23:49.83 |
+37:28:19.6 |
HIP 20653 |
23.40 |
| 2026-04-05 00:00 |
04:23:52.01 |
+37:28:13.1 |
HIP 20653 |
22.97 |
| 2026-04-05 12:00 |
04:23:54.20 |
+37:28:06.8 |
HIP 20653 |
22.54 |
| 2026-04-06 00:00 |
04:23:56.42 |
+37:28:00.6 |
HIP 20653 |
22.11 |
| 2026-04-06 12:00 |
04:23:58.66 |
+37:27:54.4 |
HIP 20653 |
21.68 |
| 2026-04-07 00:00 |
04:24:00.92 |
+37:27:48.4 |
HIP 20653 |
21.25 |
| 2026-04-07 12:00 |
04:24:03.21 |
+37:27:42.5 |
HIP 20653 |
20.81 |
| 2026-04-08 00:00 |
04:24:05.51 |
+37:27:36.6 |
HIP 20653 |
20.37 |
| 2026-04-08 12:00 |
04:24:07.84 |
+37:27:30.9 |
HIP 20653 |
19.94 |
| 2026-04-09 00:00 |
04:24:10.19 |
+37:27:25.3 |
HIP 20653 |
19.50 |
| 2026-04-09 12:00 |
04:24:12.56 |
+37:27:19.8 |
HIP 20653 |
19.06 |
| 2026-04-10 00:00 |
04:24:14.95 |
+37:27:14.4 |
HIP 20653 |
18.62 |
| 2026-04-10 12:00 |
04:24:17.36 |
+37:27:09.1 |
HIP 20653 |
18.18 |
| 2026-04-11 00:00 |
04:24:19.79 |
+37:27:03.9 |
HIP 20653 |
17.74 |
| 2026-04-11 12:00 |
04:24:22.24 |
+37:26:58.7 |
HIP 20653 |
17.30 |
| 2026-04-12 00:00 |
04:24:24.71 |
+37:26:53.7 |
HIP 20653 |
16.86 |
| 2026-04-12 12:00 |
04:24:27.20 |
+37:26:48.9 |
HIP 20653 |
16.43 |
| 2026-04-13 00:00 |
04:24:29.72 |
+37:26:44.1 |
HIP 20653 |
15.99 |
| 2026-04-13 12:00 |
04:24:32.25 |
+37:26:39.4 |
HIP 20653 |
15.56 |
| 2026-04-14 00:00 |
04:24:34.80 |
+37:26:34.8 |
HIP 20653 |
15.13 |
| 2026-04-14 12:00 |
04:24:37.37 |
+37:26:30.3 |
HIP 20653 |
14.70 |
| 2026-04-15 00:00 |
04:24:39.96 |
+37:26:25.9 |
HIP 20653 |
14.28 |
| 2026-04-15 12:00 |
04:24:42.57 |
+37:26:21.7 |
HIP 20653 |
13.87 |
| 2026-04-16 00:00 |
04:24:45.19 |
+37:26:17.5 |
HIP 20653 |
13.46 |