메타데이터
| 항목 |
값 |
| Designation |
C/1989 Q1 (Okazaki-Levy-Rudenko) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1989-11-11T21:59:23.887680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:38Z |
| Obs used |
225 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
11.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1989-10-08.0000000 |
| e |
1.00005568 |
| q (au) |
0.642331 |
| a (au) |
-11536.096034 |
| i (deg) |
90.145942 |
| Ω (om, deg) |
275.510071 |
| ω (w, deg) |
150.571089 |
| M (ma, deg) |
-0.000028 |
밝기
산란 + 전체 선형
$$
M_a = (7.901 + 2.905\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.901 |
| n |
2.905 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.286 |
| 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 |
| 1989-08-24 |
1989-09-13 |
+19.0917 |
-2.707 |
| 1989-09-13 |
1989-11-11 |
-0.2123 |
-0.358 |
| 1989-11-12 |
1990-01-05 |
+1.0681 |
+0.558 |
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 |
18:35:48.99 |
-65:01:59.5 |
HIP 91278 |
16.07 |
| 2026-07-29 12:00 |
18:35:44.98 |
-65:01:51.1 |
HIP 91278 |
16.18 |
| 2026-07-30 00:00 |
18:35:41.00 |
-65:01:42.6 |
HIP 91278 |
16.30 |
| 2026-07-30 12:00 |
18:35:37.03 |
-65:01:33.8 |
HIP 91278 |
16.42 |
| 2026-07-31 00:00 |
18:35:33.09 |
-65:01:25.0 |
HIP 91278 |
16.56 |
| 2026-07-31 12:00 |
18:35:29.16 |
-65:01:16.0 |
HIP 91278 |
16.70 |
| 2026-08-01 00:00 |
18:35:25.26 |
-65:01:06.8 |
HIP 91278 |
16.85 |
| 2026-08-01 12:00 |
18:35:21.37 |
-65:00:57.5 |
HIP 91278 |
17.01 |
| 2026-08-02 00:00 |
18:35:17.51 |
-65:00:48.0 |
HIP 91278 |
17.17 |
| 2026-08-02 12:00 |
18:35:13.67 |
-65:00:38.4 |
HIP 91278 |
17.34 |
| 2026-08-03 00:00 |
18:35:09.84 |
-65:00:28.6 |
HIP 91278 |
17.51 |
| 2026-08-03 12:00 |
18:35:06.04 |
-65:00:18.7 |
HIP 91278 |
17.69 |
| 2026-08-04 00:00 |
18:35:02.27 |
-65:00:08.6 |
HIP 91278 |
17.88 |
| 2026-08-04 12:00 |
18:34:58.51 |
-64:59:58.4 |
HIP 91278 |
18.07 |
| 2026-08-05 00:00 |
18:34:54.78 |
-64:59:48.1 |
HIP 91278 |
18.27 |
| 2026-08-05 12:00 |
18:34:51.07 |
-64:59:37.6 |
HIP 91278 |
18.47 |
| 2026-08-06 00:00 |
18:34:47.38 |
-64:59:26.9 |
HIP 91278 |
18.67 |
| 2026-08-06 12:00 |
18:34:43.72 |
-64:59:16.2 |
HIP 91278 |
18.88 |
| 2026-08-07 00:00 |
18:34:40.08 |
-64:59:05.2 |
HIP 91278 |
19.10 |
| 2026-08-07 12:00 |
18:34:36.46 |
-64:58:54.2 |
HIP 91278 |
19.31 |
| 2026-08-08 00:00 |
18:34:32.87 |
-64:58:42.9 |
HIP 91278 |
19.53 |
| 2026-08-08 12:00 |
18:34:29.30 |
-64:58:31.6 |
HIP 91278 |
19.76 |
| 2026-08-09 00:00 |
18:34:25.76 |
-64:58:20.1 |
HIP 90927 |
19.91 |
| 2026-08-09 12:00 |
18:34:22.25 |
-64:58:08.5 |
HIP 90927 |
19.91 |
| 2026-08-10 00:00 |
18:34:18.75 |
-64:57:56.7 |
HIP 90927 |
19.91 |
| 2026-08-10 12:00 |
18:34:15.29 |
-64:57:44.8 |
HIP 90927 |
19.93 |
| 2026-08-11 00:00 |
18:34:11.85 |
-64:57:32.8 |
HIP 90927 |
19.95 |
| 2026-08-11 12:00 |
18:34:08.44 |
-64:57:20.6 |
HIP 90927 |
19.99 |
| 2026-08-12 00:00 |
18:34:05.05 |
-64:57:08.3 |
HIP 90927 |
20.04 |
| 2026-08-12 12:00 |
18:34:01.69 |
-64:56:55.9 |
HIP 90927 |
20.11 |
| 2026-08-13 00:00 |
18:33:58.36 |
-64:56:43.3 |
HIP 90927 |
20.18 |
| 2026-08-13 12:00 |
18:33:55.05 |
-64:56:30.6 |
HIP 90927 |
20.26 |
| 2026-08-14 00:00 |
18:33:51.77 |
-64:56:17.8 |
HIP 90927 |
20.36 |
| 2026-08-14 12:00 |
18:33:48.52 |
-64:56:04.8 |
HIP 90927 |
20.47 |
| 2026-08-15 00:00 |
18:33:45.30 |
-64:55:51.7 |
HIP 90927 |
20.58 |
| 2026-08-15 12:00 |
18:33:42.11 |
-64:55:38.5 |
HIP 90927 |
20.71 |
| 2026-08-16 00:00 |
18:33:38.94 |
-64:55:25.2 |
HIP 90927 |
20.84 |
| 2026-08-16 12:00 |
18:33:35.81 |
-64:55:11.7 |
HIP 90927 |
20.99 |
| 2026-08-17 00:00 |
18:33:32.70 |
-64:54:58.2 |
HIP 90927 |
21.14 |
| 2026-08-17 12:00 |
18:33:29.63 |
-64:54:44.5 |
HIP 90927 |
21.30 |
| 2026-08-18 00:00 |
18:33:26.58 |
-64:54:30.6 |
HIP 90927 |
21.48 |
| 2026-08-18 12:00 |
18:33:23.56 |
-64:54:16.7 |
HIP 90927 |
21.66 |
| 2026-08-19 00:00 |
18:33:20.57 |
-64:54:02.6 |
HIP 90927 |
21.84 |