메타데이터
| 항목 |
값 |
| Designation |
C/1989 A1 (Yanaka) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1988-10-31T19:17:00.879360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:36Z |
| Obs used |
101 |
| NEO |
- |
| M1 |
5.700 |
| K1 |
16.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1989-02-04.0000000 |
| e |
0.99863759 |
| q (au) |
1.894621 |
| a (au) |
1390.639657 |
| i (deg) |
52.409723 |
| Ω (om, deg) |
157.088675 |
| ω (w, deg) |
351.561502 |
| M (ma, deg) |
0.001809 |
밝기
산란 + 전체 선형
$$
M_a = (4.241 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.241 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
20:55:22.63 |
+06:02:08.2 |
HIP 103327 |
20.31 |
| 2026-09-20 12:00 |
20:55:21.39 |
+06:01:54.2 |
HIP 103327 |
20.67 |
| 2026-09-21 00:00 |
20:55:20.17 |
+06:01:40.3 |
HIP 103327 |
21.02 |
| 2026-09-21 12:00 |
20:55:18.95 |
+06:01:26.3 |
HIP 103327 |
21.37 |
| 2026-09-22 00:00 |
20:55:17.75 |
+06:01:12.2 |
HIP 103327 |
21.72 |
| 2026-09-22 12:00 |
20:55:16.56 |
+06:00:58.2 |
HIP 103327 |
22.07 |
| 2026-09-23 00:00 |
20:55:15.39 |
+06:00:44.2 |
HIP 103327 |
22.43 |
| 2026-09-23 12:00 |
20:55:14.22 |
+06:00:30.1 |
HIP 103327 |
22.78 |
| 2026-09-24 00:00 |
20:55:13.07 |
+06:00:16.0 |
HIP 103327 |
23.13 |
| 2026-09-24 12:00 |
20:55:11.93 |
+06:00:01.9 |
HIP 103327 |
23.47 |
| 2026-09-25 00:00 |
20:55:10.81 |
+05:59:47.8 |
HIP 103327 |
23.82 |
| 2026-09-25 12:00 |
20:55:09.69 |
+05:59:33.7 |
HIP 103327 |
24.17 |
| 2026-09-26 00:00 |
20:55:08.59 |
+05:59:19.6 |
HIP 103327 |
24.52 |
| 2026-09-26 12:00 |
20:55:07.50 |
+05:59:05.4 |
HIP 103327 |
24.86 |
| 2026-09-27 00:00 |
20:55:06.42 |
+05:58:51.3 |
HIP 103327 |
25.20 |
| 2026-09-27 12:00 |
20:55:05.36 |
+05:58:37.1 |
HIP 103327 |
25.55 |
| 2026-09-28 00:00 |
20:55:04.31 |
+05:58:23.0 |
HIP 103327 |
25.89 |
| 2026-09-28 12:00 |
20:55:03.28 |
+05:58:08.8 |
HIP 103327 |
26.23 |
| 2026-09-29 00:00 |
20:55:02.25 |
+05:57:54.6 |
HIP 103327 |
26.56 |
| 2026-09-29 12:00 |
20:55:01.24 |
+05:57:40.4 |
HIP 103327 |
26.90 |
| 2026-09-30 00:00 |
20:55:00.24 |
+05:57:26.3 |
HIP 103327 |
27.23 |
| 2026-09-30 12:00 |
20:54:59.26 |
+05:57:12.1 |
HIP 103327 |
27.57 |
| 2026-10-01 00:00 |
20:54:58.29 |
+05:56:57.9 |
HIP 103327 |
27.90 |
| 2026-10-01 12:00 |
20:54:57.33 |
+05:56:43.7 |
HIP 103327 |
28.23 |
| 2026-10-02 00:00 |
20:54:56.39 |
+05:56:29.5 |
HIP 103327 |
28.56 |
| 2026-10-02 12:00 |
20:54:55.46 |
+05:56:15.4 |
HIP 103327 |
28.88 |
| 2026-10-03 00:00 |
20:54:54.55 |
+05:56:01.2 |
HIP 103327 |
29.21 |
| 2026-10-03 12:00 |
20:54:53.65 |
+05:55:47.0 |
HIP 103327 |
29.53 |
| 2026-10-04 00:00 |
20:54:52.76 |
+05:55:32.8 |
HIP 103327 |
29.85 |
| 2026-10-04 12:00 |
20:54:51.88 |
+05:55:18.7 |
HIP 103327 |
30.17 |
| 2026-10-05 00:00 |
20:54:51.03 |
+05:55:04.5 |
HIP 103327 |
30.48 |
| 2026-10-05 12:00 |
20:54:50.18 |
+05:54:50.4 |
HIP 103327 |
30.80 |
| 2026-10-06 00:00 |
20:54:49.35 |
+05:54:36.3 |
HIP 103327 |
31.11 |
| 2026-10-06 12:00 |
20:54:48.53 |
+05:54:22.1 |
HIP 103327 |
31.42 |
| 2026-10-07 00:00 |
20:54:47.73 |
+05:54:08.0 |
HIP 103327 |
31.72 |
| 2026-10-07 12:00 |
20:54:46.94 |
+05:53:53.9 |
HIP 103327 |
32.03 |
| 2026-10-08 00:00 |
20:54:46.17 |
+05:53:39.8 |
HIP 103396 |
32.26 |
| 2026-10-08 12:00 |
20:54:45.41 |
+05:53:25.8 |
HIP 103396 |
32.38 |
| 2026-10-09 00:00 |
20:54:44.67 |
+05:53:11.7 |
HIP 103396 |
32.51 |
| 2026-10-09 12:00 |
20:54:43.94 |
+05:52:57.7 |
HIP 103396 |
32.63 |
| 2026-10-10 00:00 |
20:54:43.23 |
+05:52:43.7 |
HIP 103396 |
32.75 |
| 2026-10-10 12:00 |
20:54:42.53 |
+05:52:29.7 |
HIP 103396 |
32.87 |
| 2026-10-11 00:00 |
20:54:41.85 |
+05:52:15.7 |
HIP 103396 |
32.99 |