메타데이터
| 항목 |
값 |
| Designation |
C/1990 K1 (Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1990-10-24T16:24:53.331840Z |
| Orbit solution date (soln_date, UTC) |
2023-08-19T20:42:31Z |
| Obs used |
666 |
| NEO |
- |
| M1 |
4.600 |
| K1 |
9.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1990-10-29.0000000 |
| e |
1.00058309 |
| q (au) |
0.938738 |
| a (au) |
-1609.945375 |
| i (deg) |
131.583977 |
| Ω (om, deg) |
139.364097 |
| ω (w, deg) |
242.666331 |
| M (ma, deg) |
0.000066 |
밝기
산란 + 전체 선형
$$
M_a = (4.561 + 3.402\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.561 |
| n |
3.402 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.916 |
| δ90 |
1.000 |
| 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 |
| 1990-05-20 |
1990-07-17 |
+0.5628 |
-0.382 |
| 1990-07-17 |
1990-10-23 |
-2.7920 |
+0.454 |
| 1990-10-24 |
1991-04-15 |
+1.4645 |
+0.190 |
| 1991-04-15 |
1991-11-07 |
-5.2198 |
+3.605 |
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 |
07:20:38.80 |
+55:49:46.0 |
HIP 35530 |
27.10 |
| 2026-07-29 12:00 |
07:20:41.94 |
+55:49:48.2 |
HIP 35530 |
27.16 |
| 2026-07-30 00:00 |
07:20:45.08 |
+55:49:50.5 |
HIP 35530 |
27.22 |
| 2026-07-30 12:00 |
07:20:48.21 |
+55:49:53.0 |
HIP 35530 |
27.29 |
| 2026-07-31 00:00 |
07:20:51.32 |
+55:49:55.6 |
HIP 35530 |
27.37 |
| 2026-07-31 12:00 |
07:20:54.43 |
+55:49:58.3 |
HIP 35530 |
27.45 |
| 2026-08-01 00:00 |
07:20:57.53 |
+55:50:01.1 |
HIP 35530 |
27.53 |
| 2026-08-01 12:00 |
07:21:00.62 |
+55:50:04.1 |
HIP 35530 |
27.62 |
| 2026-08-02 00:00 |
07:21:03.70 |
+55:50:07.2 |
HIP 35530 |
27.71 |
| 2026-08-02 12:00 |
07:21:06.77 |
+55:50:10.5 |
HIP 35530 |
27.80 |
| 2026-08-03 00:00 |
07:21:09.84 |
+55:50:13.8 |
HIP 35530 |
27.90 |
| 2026-08-03 12:00 |
07:21:12.89 |
+55:50:17.3 |
HIP 35530 |
28.01 |
| 2026-08-04 00:00 |
07:21:15.93 |
+55:50:20.9 |
HIP 35530 |
28.11 |
| 2026-08-04 12:00 |
07:21:18.96 |
+55:50:24.7 |
HIP 35530 |
28.22 |
| 2026-08-05 00:00 |
07:21:21.98 |
+55:50:28.6 |
HIP 35530 |
28.33 |
| 2026-08-05 12:00 |
07:21:24.99 |
+55:50:32.6 |
HIP 35530 |
28.45 |
| 2026-08-06 00:00 |
07:21:27.99 |
+55:50:36.8 |
HIP 35530 |
28.57 |
| 2026-08-06 12:00 |
07:21:30.97 |
+55:50:41.0 |
HIP 35530 |
28.69 |
| 2026-08-07 00:00 |
07:21:33.95 |
+55:50:45.4 |
HIP 35530 |
28.82 |
| 2026-08-07 12:00 |
07:21:36.91 |
+55:50:50.0 |
HIP 35530 |
28.95 |
| 2026-08-08 00:00 |
07:21:39.87 |
+55:50:54.6 |
HIP 35530 |
29.08 |
| 2026-08-08 12:00 |
07:21:42.81 |
+55:50:59.4 |
HIP 35530 |
29.22 |
| 2026-08-09 00:00 |
07:21:45.74 |
+55:51:04.4 |
HIP 35530 |
29.35 |
| 2026-08-09 12:00 |
07:21:48.65 |
+55:51:09.4 |
HIP 35530 |
29.49 |
| 2026-08-10 00:00 |
07:21:51.55 |
+55:51:14.6 |
HIP 35530 |
29.63 |
| 2026-08-10 12:00 |
07:21:54.44 |
+55:51:19.9 |
HIP 35530 |
29.78 |
| 2026-08-11 00:00 |
07:21:57.32 |
+55:51:25.4 |
HIP 35530 |
29.93 |
| 2026-08-11 12:00 |
07:22:00.18 |
+55:51:30.9 |
HIP 35530 |
30.07 |
| 2026-08-12 00:00 |
07:22:03.03 |
+55:51:36.6 |
HIP 35530 |
30.22 |
| 2026-08-12 12:00 |
07:22:05.87 |
+55:51:42.5 |
HIP 35530 |
30.38 |
| 2026-08-13 00:00 |
07:22:08.69 |
+55:51:48.4 |
HIP 35530 |
30.53 |
| 2026-08-13 12:00 |
07:22:11.49 |
+55:51:54.5 |
HIP 35530 |
30.69 |
| 2026-08-14 00:00 |
07:22:14.29 |
+55:52:00.7 |
HIP 35530 |
30.84 |
| 2026-08-14 12:00 |
07:22:17.06 |
+55:52:07.0 |
HIP 35530 |
31.00 |
| 2026-08-15 00:00 |
07:22:19.83 |
+55:52:13.5 |
HIP 35530 |
31.16 |
| 2026-08-15 12:00 |
07:22:22.57 |
+55:52:20.1 |
HIP 35530 |
31.32 |
| 2026-08-16 00:00 |
07:22:25.31 |
+55:52:26.8 |
HIP 35530 |
31.49 |
| 2026-08-16 12:00 |
07:22:28.02 |
+55:52:33.6 |
HIP 35530 |
31.65 |
| 2026-08-17 00:00 |
07:22:30.72 |
+55:52:40.6 |
HIP 35530 |
31.81 |
| 2026-08-17 12:00 |
07:22:33.41 |
+55:52:47.7 |
HIP 35530 |
31.98 |
| 2026-08-18 00:00 |
07:22:36.08 |
+55:52:54.9 |
HIP 35530 |
32.15 |
| 2026-08-18 12:00 |
07:22:38.73 |
+55:53:02.3 |
HIP 35530 |
32.31 |
| 2026-08-19 00:00 |
07:22:41.37 |
+55:53:09.7 |
HIP 35530 |
32.48 |