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) |
| 2026-06-01 00:00 |
21:49:03.71 |
-27:31:41.1 |
HIP 107766 |
13.39 |
| 2026-06-01 12:00 |
21:49:03.01 |
-27:31:53.2 |
HIP 107766 |
13.63 |
| 2026-06-02 00:00 |
21:49:02.29 |
-27:32:05.4 |
HIP 107766 |
13.88 |
| 2026-06-02 12:00 |
21:49:01.55 |
-27:32:17.7 |
HIP 107766 |
14.13 |
| 2026-06-03 00:00 |
21:49:00.79 |
-27:32:30.0 |
HIP 107766 |
14.39 |
| 2026-06-03 12:00 |
21:49:00.01 |
-27:32:42.4 |
HIP 107766 |
14.65 |
| 2026-06-04 00:00 |
21:48:59.20 |
-27:32:54.9 |
HIP 107766 |
14.91 |
| 2026-06-04 12:00 |
21:48:58.38 |
-27:33:07.5 |
HIP 107766 |
15.18 |
| 2026-06-05 00:00 |
21:48:57.54 |
-27:33:20.1 |
HIP 107766 |
15.46 |
| 2026-06-05 12:00 |
21:48:56.67 |
-27:33:32.8 |
HIP 107766 |
15.74 |
| 2026-06-06 00:00 |
21:48:55.79 |
-27:33:45.6 |
HIP 107766 |
16.02 |
| 2026-06-06 12:00 |
21:48:54.89 |
-27:33:58.5 |
HIP 107766 |
16.31 |
| 2026-06-07 00:00 |
21:48:53.96 |
-27:34:11.4 |
HIP 107766 |
16.60 |
| 2026-06-07 12:00 |
21:48:53.02 |
-27:34:24.3 |
HIP 107766 |
16.90 |
| 2026-06-08 00:00 |
21:48:52.05 |
-27:34:37.4 |
HIP 107766 |
17.20 |
| 2026-06-08 12:00 |
21:48:51.07 |
-27:34:50.5 |
HIP 107766 |
17.51 |
| 2026-06-09 00:00 |
21:48:50.06 |
-27:35:03.7 |
HIP 107766 |
17.82 |
| 2026-06-09 12:00 |
21:48:49.04 |
-27:35:16.9 |
HIP 107601 |
17.97 |
| 2026-06-10 00:00 |
21:48:47.99 |
-27:35:30.2 |
HIP 107601 |
17.65 |
| 2026-06-10 12:00 |
21:48:46.93 |
-27:35:43.6 |
HIP 107601 |
17.33 |
| 2026-06-11 00:00 |
21:48:45.84 |
-27:35:57.0 |
HIP 107601 |
17.01 |
| 2026-06-11 12:00 |
21:48:44.74 |
-27:36:10.5 |
HIP 107601 |
16.68 |
| 2026-06-12 00:00 |
21:48:43.61 |
-27:36:24.1 |
HIP 107601 |
16.35 |
| 2026-06-12 12:00 |
21:48:42.47 |
-27:36:37.7 |
HIP 107601 |
16.02 |
| 2026-06-13 00:00 |
21:48:41.30 |
-27:36:51.3 |
HIP 107601 |
15.68 |
| 2026-06-13 12:00 |
21:48:40.12 |
-27:37:05.1 |
HIP 107601 |
15.34 |
| 2026-06-14 00:00 |
21:48:38.92 |
-27:37:18.8 |
HIP 107601 |
14.99 |
| 2026-06-14 12:00 |
21:48:37.70 |
-27:37:32.7 |
HIP 107601 |
14.64 |
| 2026-06-15 00:00 |
21:48:36.46 |
-27:37:46.5 |
HIP 107601 |
14.28 |
| 2026-06-15 12:00 |
21:48:35.19 |
-27:38:00.5 |
HIP 107601 |
13.92 |
| 2026-06-16 00:00 |
21:48:33.92 |
-27:38:14.5 |
HIP 107601 |
13.56 |
| 2026-06-16 12:00 |
21:48:32.62 |
-27:38:28.5 |
HIP 107601 |
13.20 |
| 2026-06-17 00:00 |
21:48:31.30 |
-27:38:42.6 |
HIP 107601 |
12.83 |
| 2026-06-17 12:00 |
21:48:29.96 |
-27:38:56.7 |
HIP 107601 |
12.45 |
| 2026-06-18 00:00 |
21:48:28.61 |
-27:39:10.9 |
HIP 107601 |
12.08 |
| 2026-06-18 12:00 |
21:48:27.24 |
-27:39:25.1 |
HIP 107601 |
11.69 |
| 2026-06-19 00:00 |
21:48:25.84 |
-27:39:39.4 |
HIP 107601 |
11.31 |
| 2026-06-19 12:00 |
21:48:24.43 |
-27:39:53.7 |
HIP 107601 |
10.92 |
| 2026-06-20 00:00 |
21:48:23.00 |
-27:40:08.1 |
HIP 107601 |
10.53 |
| 2026-06-20 12:00 |
21:48:21.56 |
-27:40:22.5 |
HIP 107601 |
10.14 |
| 2026-06-21 00:00 |
21:48:20.09 |
-27:40:36.9 |
HIP 107601 |
9.74 |
| 2026-06-21 12:00 |
21:48:18.61 |
-27:40:51.4 |
HIP 107601 |
9.33 |
| 2026-06-22 00:00 |
21:48:17.11 |
-27:41:05.9 |
HIP 107601 |
8.93 |