메타데이터
| 항목 |
값 |
| Designation |
D/1977 C1 (Skiff-Kosai) |
| Type |
D |
| Perihelion (tp_cal, UTC) |
1976-08-03T23:51:26.127360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
8 |
| NEO |
- |
| M1 |
8.500 |
| K1 |
15.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1977-02-23.0000000 |
| e |
0.25917112 |
| q (au) |
2.849755 |
| a (au) |
3.846712 |
| i (deg) |
3.201388 |
| Ω (om, deg) |
80.768376 |
| ω (w, deg) |
26.550778 |
| M (ma, deg) |
26.520292 |
밝기
산란 + 전체 선형
$$
M_a = (12.449 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.449 |
| n |
2.000 |
| 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) |
| 2026-06-01 00:00 |
22:16:06.92 |
-13:50:31.6 |
HIP 109970 |
12.96 |
| 2026-06-01 12:00 |
22:16:14.47 |
-13:50:14.4 |
HIP 109970 |
12.73 |
| 2026-06-02 00:00 |
22:16:21.84 |
-13:49:58.4 |
HIP 109970 |
12.75 |
| 2026-06-02 12:00 |
22:16:29.02 |
-13:49:43.5 |
HIP 109970 |
13.01 |
| 2026-06-03 00:00 |
22:16:36.01 |
-13:49:29.6 |
HIP 109970 |
13.46 |
| 2026-06-03 12:00 |
22:16:42.81 |
-13:49:16.9 |
HIP 109970 |
14.08 |
| 2026-06-04 00:00 |
22:16:49.42 |
-13:49:05.3 |
HIP 109970 |
14.82 |
| 2026-06-04 12:00 |
22:16:55.84 |
-13:48:54.8 |
HIP 109970 |
15.66 |
| 2026-06-05 00:00 |
22:17:02.06 |
-13:48:45.4 |
HIP 109970 |
16.56 |
| 2026-06-05 12:00 |
22:17:08.10 |
-13:48:37.2 |
HIP 109970 |
17.51 |
| 2026-06-06 00:00 |
22:17:13.94 |
-13:48:30.0 |
HIP 109970 |
18.48 |
| 2026-06-06 12:00 |
22:17:19.59 |
-13:48:24.1 |
HIP 109970 |
19.45 |
| 2026-06-07 00:00 |
22:17:25.04 |
-13:48:19.2 |
HIP 109970 |
20.43 |
| 2026-06-07 12:00 |
22:17:30.29 |
-13:48:15.5 |
HIP 109970 |
21.40 |
| 2026-06-08 00:00 |
22:17:35.35 |
-13:48:12.9 |
HIP 109970 |
22.35 |
| 2026-06-08 12:00 |
22:17:40.21 |
-13:48:11.5 |
HIP 109970 |
23.27 |
| 2026-06-09 00:00 |
22:17:44.87 |
-13:48:11.2 |
HIP 109970 |
24.17 |
| 2026-06-09 12:00 |
22:17:49.34 |
-13:48:12.1 |
HIP 109970 |
25.04 |
| 2026-06-10 00:00 |
22:17:53.60 |
-13:48:14.2 |
HIP 110030 |
25.69 |
| 2026-06-10 12:00 |
22:17:57.66 |
-13:48:17.4 |
HIP 110030 |
26.07 |
| 2026-06-11 00:00 |
22:18:01.52 |
-13:48:21.8 |
HIP 110030 |
26.45 |
| 2026-06-11 12:00 |
22:18:05.18 |
-13:48:27.4 |
HIP 110030 |
26.80 |
| 2026-06-12 00:00 |
22:18:08.63 |
-13:48:34.1 |
HIP 110030 |
27.14 |
| 2026-06-12 12:00 |
22:18:11.89 |
-13:48:42.0 |
HIP 110030 |
27.46 |
| 2026-06-13 00:00 |
22:18:14.93 |
-13:48:51.1 |
HIP 110030 |
27.75 |
| 2026-06-13 12:00 |
22:18:17.77 |
-13:49:01.4 |
HIP 110030 |
28.02 |
| 2026-06-14 00:00 |
22:18:20.41 |
-13:49:12.9 |
HIP 110030 |
28.25 |
| 2026-06-14 12:00 |
22:18:22.84 |
-13:49:25.5 |
HIP 110030 |
28.45 |
| 2026-06-15 00:00 |
22:18:25.06 |
-13:49:39.4 |
HIP 110030 |
28.62 |
| 2026-06-15 12:00 |
22:18:27.07 |
-13:49:54.4 |
HIP 110030 |
28.75 |
| 2026-06-16 00:00 |
22:18:28.88 |
-13:50:10.6 |
HIP 110030 |
28.84 |
| 2026-06-16 12:00 |
22:18:30.48 |
-13:50:28.0 |
HIP 110030 |
28.88 |
| 2026-06-17 00:00 |
22:18:31.87 |
-13:50:46.6 |
HIP 110030 |
28.89 |
| 2026-06-17 12:00 |
22:18:33.05 |
-13:51:06.4 |
HIP 110030 |
28.86 |
| 2026-06-18 00:00 |
22:18:34.02 |
-13:51:27.4 |
HIP 110030 |
28.78 |
| 2026-06-18 12:00 |
22:18:34.78 |
-13:51:49.6 |
HIP 110030 |
28.66 |
| 2026-06-19 00:00 |
22:18:35.33 |
-13:52:12.9 |
HIP 110030 |
28.49 |
| 2026-06-19 12:00 |
22:18:35.68 |
-13:52:37.5 |
HIP 110030 |
28.27 |
| 2026-06-20 00:00 |
22:18:35.81 |
-13:53:03.2 |
HIP 110030 |
28.01 |
| 2026-06-20 12:00 |
22:18:35.73 |
-13:53:30.1 |
HIP 110030 |
27.70 |
| 2026-06-21 00:00 |
22:18:35.44 |
-13:53:58.2 |
HIP 110030 |
27.35 |
| 2026-06-21 12:00 |
22:18:34.94 |
-13:54:27.4 |
HIP 110030 |
26.94 |
| 2026-06-22 00:00 |
22:18:34.23 |
-13:54:57.9 |
HIP 110030 |
26.49 |