메타데이터
| 항목 |
값 |
| Designation |
C/1987 Q1 (Rudenko) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-10-09T12:40:34.371840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
10.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1987-09-27.0000000 |
| e |
1.00044313 |
| q (au) |
0.602602 |
| a (au) |
-1359.867867 |
| i (deg) |
114.875276 |
| Ω (om, deg) |
298.569684 |
| ω (w, deg) |
143.833532 |
| M (ma, deg) |
-0.000246 |
밝기
산란 + 전체 선형
$$
M_a = (7.946 + 3.712\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.946 |
| n |
3.712 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
23:04:18.97 |
-52:50:59.8 |
HIP 113799 |
15.88 |
| 2026-09-20 12:00 |
23:04:16.17 |
-52:51:02.2 |
HIP 113799 |
15.48 |
| 2026-09-21 00:00 |
23:04:13.37 |
-52:51:04.3 |
HIP 113799 |
15.09 |
| 2026-09-21 12:00 |
23:04:10.58 |
-52:51:06.3 |
HIP 113799 |
14.70 |
| 2026-09-22 00:00 |
23:04:07.79 |
-52:51:08.0 |
HIP 113799 |
14.31 |
| 2026-09-22 12:00 |
23:04:05.01 |
-52:51:09.6 |
HIP 113799 |
13.93 |
| 2026-09-23 00:00 |
23:04:02.24 |
-52:51:11.0 |
HIP 113799 |
13.56 |
| 2026-09-23 12:00 |
23:03:59.47 |
-52:51:12.2 |
HIP 113799 |
13.19 |
| 2026-09-24 00:00 |
23:03:56.71 |
-52:51:13.2 |
HIP 113799 |
12.82 |
| 2026-09-24 12:00 |
23:03:53.96 |
-52:51:14.0 |
HIP 113799 |
12.46 |
| 2026-09-25 00:00 |
23:03:51.21 |
-52:51:14.6 |
HIP 113799 |
12.11 |
| 2026-09-25 12:00 |
23:03:48.48 |
-52:51:15.1 |
HIP 113799 |
11.76 |
| 2026-09-26 00:00 |
23:03:45.75 |
-52:51:15.4 |
HIP 113799 |
11.42 |
| 2026-09-26 12:00 |
23:03:43.02 |
-52:51:15.4 |
HIP 113799 |
11.09 |
| 2026-09-27 00:00 |
23:03:40.31 |
-52:51:15.3 |
HIP 113799 |
10.77 |
| 2026-09-27 12:00 |
23:03:37.60 |
-52:51:15.0 |
HIP 113799 |
10.45 |
| 2026-09-28 00:00 |
23:03:34.91 |
-52:51:14.5 |
HIP 113799 |
10.15 |
| 2026-09-28 12:00 |
23:03:32.22 |
-52:51:13.8 |
HIP 113799 |
9.86 |
| 2026-09-29 00:00 |
23:03:29.54 |
-52:51:13.0 |
HIP 113799 |
9.57 |
| 2026-09-29 12:00 |
23:03:26.87 |
-52:51:11.9 |
HIP 113799 |
9.30 |
| 2026-09-30 00:00 |
23:03:24.21 |
-52:51:10.7 |
HIP 113799 |
9.05 |
| 2026-09-30 12:00 |
23:03:21.55 |
-52:51:09.3 |
HIP 113799 |
8.80 |
| 2026-10-01 00:00 |
23:03:18.91 |
-52:51:07.6 |
HIP 113799 |
8.57 |
| 2026-10-01 12:00 |
23:03:16.28 |
-52:51:05.8 |
HIP 113799 |
8.36 |
| 2026-10-02 00:00 |
23:03:13.66 |
-52:51:03.8 |
HIP 113799 |
8.17 |
| 2026-10-02 12:00 |
23:03:11.05 |
-52:51:01.7 |
HIP 113799 |
7.99 |
| 2026-10-03 00:00 |
23:03:08.45 |
-52:50:59.3 |
HIP 113799 |
7.84 |
| 2026-10-03 12:00 |
23:03:05.85 |
-52:50:56.7 |
HIP 113799 |
7.70 |
| 2026-10-04 00:00 |
23:03:03.27 |
-52:50:54.0 |
HIP 113799 |
7.59 |
| 2026-10-04 12:00 |
23:03:00.71 |
-52:50:51.1 |
HIP 113799 |
7.49 |
| 2026-10-05 00:00 |
23:02:58.15 |
-52:50:48.0 |
HIP 113799 |
7.42 |
| 2026-10-05 12:00 |
23:02:55.60 |
-52:50:44.7 |
HIP 113799 |
7.38 |
| 2026-10-06 00:00 |
23:02:53.07 |
-52:50:41.2 |
HIP 113799 |
7.36 |
| 2026-10-06 12:00 |
23:02:50.55 |
-52:50:37.5 |
HIP 113799 |
7.36 |
| 2026-10-07 00:00 |
23:02:48.04 |
-52:50:33.6 |
HIP 113799 |
7.38 |
| 2026-10-07 12:00 |
23:02:45.54 |
-52:50:29.6 |
HIP 113799 |
7.43 |
| 2026-10-08 00:00 |
23:02:43.05 |
-52:50:25.3 |
HIP 113799 |
7.50 |
| 2026-10-08 12:00 |
23:02:40.58 |
-52:50:20.9 |
HIP 113799 |
7.59 |
| 2026-10-09 00:00 |
23:02:38.12 |
-52:50:16.3 |
HIP 113799 |
7.70 |
| 2026-10-09 12:00 |
23:02:35.68 |
-52:50:11.5 |
HIP 113799 |
7.83 |
| 2026-10-10 00:00 |
23:02:33.25 |
-52:50:06.5 |
HIP 113799 |
7.98 |
| 2026-10-10 12:00 |
23:02:30.83 |
-52:50:01.4 |
HIP 113799 |
8.15 |
| 2026-10-11 00:00 |
23:02:28.42 |
-52:49:56.0 |
HIP 113799 |
8.33 |