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) |
| 2026-03-26 00:00 |
21:47:32.62 |
-27:20:10.2 |
HIP 107613 |
4.31 |
| 2026-03-26 12:00 |
21:47:34.50 |
-27:20:07.6 |
HIP 107613 |
4.06 |
| 2026-03-27 00:00 |
21:47:36.37 |
-27:20:05.0 |
HIP 107613 |
3.84 |
| 2026-03-27 12:00 |
21:47:38.22 |
-27:20:02.6 |
HIP 107613 |
3.65 |
| 2026-03-28 00:00 |
21:47:40.06 |
-27:20:00.4 |
HIP 107613 |
3.50 |
| 2026-03-28 12:00 |
21:47:41.89 |
-27:19:58.2 |
HIP 107613 |
3.39 |
| 2026-03-29 00:00 |
21:47:43.70 |
-27:19:56.2 |
HIP 107613 |
3.33 |
| 2026-03-29 12:00 |
21:47:45.49 |
-27:19:54.2 |
HIP 107613 |
3.32 |
| 2026-03-30 00:00 |
21:47:47.27 |
-27:19:52.4 |
HIP 107613 |
3.35 |
| 2026-03-30 12:00 |
21:47:49.04 |
-27:19:50.7 |
HIP 107613 |
3.42 |
| 2026-03-31 00:00 |
21:47:50.79 |
-27:19:49.2 |
HIP 107613 |
3.54 |
| 2026-03-31 12:00 |
21:47:52.53 |
-27:19:47.7 |
HIP 107613 |
3.69 |
| 2026-04-01 00:00 |
21:47:54.25 |
-27:19:46.4 |
HIP 107613 |
3.87 |
| 2026-04-01 12:00 |
21:47:55.96 |
-27:19:45.2 |
HIP 107613 |
4.07 |
| 2026-04-02 00:00 |
21:47:57.65 |
-27:19:44.1 |
HIP 107613 |
4.29 |
| 2026-04-02 12:00 |
21:47:59.32 |
-27:19:43.2 |
HIP 107613 |
4.53 |
| 2026-04-03 00:00 |
21:48:00.98 |
-27:19:42.3 |
HIP 107613 |
4.79 |
| 2026-04-03 12:00 |
21:48:02.63 |
-27:19:41.6 |
HIP 107613 |
5.05 |
| 2026-04-04 00:00 |
21:48:04.25 |
-27:19:41.0 |
HIP 107613 |
5.32 |
| 2026-04-04 12:00 |
21:48:05.87 |
-27:19:40.5 |
HIP 107613 |
5.60 |
| 2026-04-05 00:00 |
21:48:07.46 |
-27:19:40.2 |
HIP 107613 |
5.88 |
| 2026-04-05 12:00 |
21:48:09.04 |
-27:19:39.9 |
HIP 107613 |
6.17 |
| 2026-04-06 00:00 |
21:48:10.61 |
-27:19:39.8 |
HIP 107613 |
6.45 |
| 2026-04-06 12:00 |
21:48:12.15 |
-27:19:39.8 |
HIP 107613 |
6.74 |
| 2026-04-07 00:00 |
21:48:13.69 |
-27:19:40.0 |
HIP 107613 |
7.03 |
| 2026-04-07 12:00 |
21:48:15.20 |
-27:19:40.2 |
HIP 107613 |
7.32 |
| 2026-04-08 00:00 |
21:48:16.70 |
-27:19:40.6 |
HIP 107613 |
7.61 |
| 2026-04-08 12:00 |
21:48:18.18 |
-27:19:41.1 |
HIP 107613 |
7.90 |
| 2026-04-09 00:00 |
21:48:19.64 |
-27:19:41.7 |
HIP 107613 |
8.19 |
| 2026-04-09 12:00 |
21:48:21.09 |
-27:19:42.4 |
HIP 107613 |
8.48 |
| 2026-04-10 00:00 |
21:48:22.52 |
-27:19:43.3 |
HIP 107613 |
8.76 |
| 2026-04-10 12:00 |
21:48:23.93 |
-27:19:44.3 |
HIP 107613 |
9.04 |
| 2026-04-11 00:00 |
21:48:25.33 |
-27:19:45.4 |
HIP 107613 |
9.32 |
| 2026-04-11 12:00 |
21:48:26.71 |
-27:19:46.6 |
HIP 107613 |
9.60 |
| 2026-04-12 00:00 |
21:48:28.07 |
-27:19:48.0 |
HIP 107613 |
9.88 |
| 2026-04-12 12:00 |
21:48:29.41 |
-27:19:49.4 |
HIP 107613 |
10.15 |
| 2026-04-13 00:00 |
21:48:30.74 |
-27:19:51.0 |
HIP 107613 |
10.42 |
| 2026-04-13 12:00 |
21:48:32.04 |
-27:19:52.7 |
HIP 107613 |
10.68 |
| 2026-04-14 00:00 |
21:48:33.33 |
-27:19:54.6 |
HIP 107613 |
10.95 |
| 2026-04-14 12:00 |
21:48:34.60 |
-27:19:56.5 |
HIP 107613 |
11.21 |
| 2026-04-15 00:00 |
21:48:35.86 |
-27:19:58.6 |
HIP 107613 |
11.46 |
| 2026-04-15 12:00 |
21:48:37.09 |
-27:20:00.8 |
HIP 107613 |
11.71 |
| 2026-04-16 00:00 |
21:48:38.31 |
-27:20:03.2 |
HIP 107613 |
11.96 |