메타데이터
| 항목 |
값 |
| Designation |
C/1999 H1 (Lee) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-07-11T04:07:54.053760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:59Z |
| Obs used |
1019 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
11.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1999-08-17.0000000 |
| e |
0.99974475 |
| q (au) |
0.708107 |
| a (au) |
2774.129592 |
| i (deg) |
149.352905 |
| Ω (om, deg) |
162.650897 |
| ω (w, deg) |
40.701567 |
| M (ma, deg) |
0.000248 |
밝기
산란 + 전체 선형
$$
M_a = (5.906 + 4.943\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.906 |
| n |
4.943 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 1999-04-16 |
1999-05-14 |
+7.7311 |
-0.623 |
| 1999-05-14 |
1999-07-04 |
-1.8550 |
+0.208 |
| 1999-07-27 |
2000-01-08 |
+0.8828 |
+0.043 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
21:45:45.20 |
-27:59:29.9 |
HIP 107425 |
8.87 |
| 2026-07-29 12:00 |
21:45:42.73 |
-27:59:44.2 |
HIP 107425 |
8.44 |
| 2026-07-30 00:00 |
21:45:40.26 |
-27:59:58.4 |
HIP 107425 |
8.03 |
| 2026-07-30 12:00 |
21:45:37.78 |
-28:00:12.6 |
HIP 107425 |
7.65 |
| 2026-07-31 00:00 |
21:45:35.29 |
-28:00:26.7 |
HIP 107425 |
7.30 |
| 2026-07-31 12:00 |
21:45:32.80 |
-28:00:40.8 |
HIP 107425 |
6.98 |
| 2026-08-01 00:00 |
21:45:30.30 |
-28:00:54.9 |
HIP 107425 |
6.70 |
| 2026-08-01 12:00 |
21:45:27.79 |
-28:01:08.9 |
HIP 107425 |
6.47 |
| 2026-08-02 00:00 |
21:45:25.28 |
-28:01:22.8 |
HIP 107425 |
6.28 |
| 2026-08-02 12:00 |
21:45:22.77 |
-28:01:36.7 |
HIP 107425 |
6.15 |
| 2026-08-03 00:00 |
21:45:20.24 |
-28:01:50.5 |
HIP 107425 |
6.08 |
| 2026-08-03 12:00 |
21:45:17.72 |
-28:02:04.3 |
HIP 107425 |
6.07 |
| 2026-08-04 00:00 |
21:45:15.18 |
-28:02:18.1 |
HIP 107425 |
6.12 |
| 2026-08-04 12:00 |
21:45:12.65 |
-28:02:31.7 |
HIP 107425 |
6.23 |
| 2026-08-05 00:00 |
21:45:10.10 |
-28:02:45.4 |
HIP 107425 |
6.40 |
| 2026-08-05 12:00 |
21:45:07.56 |
-28:02:58.9 |
HIP 107425 |
6.62 |
| 2026-08-06 00:00 |
21:45:05.00 |
-28:03:12.4 |
HIP 107425 |
6.88 |
| 2026-08-06 12:00 |
21:45:02.45 |
-28:03:25.9 |
HIP 107425 |
7.19 |
| 2026-08-07 00:00 |
21:44:59.89 |
-28:03:39.3 |
HIP 107425 |
7.54 |
| 2026-08-07 12:00 |
21:44:57.33 |
-28:03:52.6 |
HIP 107425 |
7.92 |
| 2026-08-08 00:00 |
21:44:54.76 |
-28:04:05.9 |
HIP 107425 |
8.33 |
| 2026-08-08 12:00 |
21:44:52.19 |
-28:04:19.1 |
HIP 107425 |
8.76 |
| 2026-08-09 00:00 |
21:44:49.61 |
-28:04:32.2 |
HIP 107425 |
9.21 |
| 2026-08-09 12:00 |
21:44:47.04 |
-28:04:45.3 |
HIP 107425 |
9.68 |
| 2026-08-10 00:00 |
21:44:44.46 |
-28:04:58.3 |
HIP 107425 |
10.17 |
| 2026-08-10 12:00 |
21:44:41.87 |
-28:05:11.2 |
HIP 107425 |
10.67 |
| 2026-08-11 00:00 |
21:44:39.29 |
-28:05:24.1 |
HIP 107425 |
11.18 |
| 2026-08-11 12:00 |
21:44:36.70 |
-28:05:36.9 |
HIP 107425 |
11.70 |
| 2026-08-12 00:00 |
21:44:34.11 |
-28:05:49.6 |
HIP 107425 |
12.23 |
| 2026-08-12 12:00 |
21:44:31.52 |
-28:06:02.3 |
HIP 107425 |
12.77 |
| 2026-08-13 00:00 |
21:44:28.93 |
-28:06:14.8 |
HIP 107425 |
13.31 |
| 2026-08-13 12:00 |
21:44:26.33 |
-28:06:27.4 |
HIP 107425 |
13.86 |
| 2026-08-14 00:00 |
21:44:23.74 |
-28:06:39.8 |
HIP 107305 |
13.95 |
| 2026-08-14 12:00 |
21:44:21.14 |
-28:06:52.1 |
HIP 107305 |
13.96 |
| 2026-08-15 00:00 |
21:44:18.54 |
-28:07:04.4 |
HIP 107305 |
13.99 |
| 2026-08-15 12:00 |
21:44:15.94 |
-28:07:16.6 |
HIP 107305 |
14.04 |
| 2026-08-16 00:00 |
21:44:13.34 |
-28:07:28.8 |
HIP 107305 |
14.12 |
| 2026-08-16 12:00 |
21:44:10.75 |
-28:07:40.8 |
HIP 107305 |
14.23 |
| 2026-08-17 00:00 |
21:44:08.15 |
-28:07:52.8 |
HIP 107305 |
14.36 |
| 2026-08-17 12:00 |
21:44:05.55 |
-28:08:04.6 |
HIP 107305 |
14.51 |
| 2026-08-18 00:00 |
21:44:02.95 |
-28:08:16.5 |
HIP 107305 |
14.68 |
| 2026-08-18 12:00 |
21:44:00.35 |
-28:08:28.2 |
HIP 107305 |
14.87 |
| 2026-08-19 00:00 |
21:43:57.76 |
-28:08:39.8 |
HIP 107305 |
15.09 |