C/1983 O2 (IRAS)
메타데이터
| 항목 |
값 |
| Designation |
C/1983 O2 (IRAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1983-11-28T00:05:51.535680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
35 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
10.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1984-02-25.0000000 |
| e |
1.00012977 |
| q (au) |
2.254797 |
| a (au) |
-17374.673642 |
| i (deg) |
120.736009 |
| Ω (om, deg) |
201.257657 |
| ω (w, deg) |
333.980548 |
| M (ma, deg) |
0.000038 |
밝기
산란 + 전체 선형
$$
M_a = (6.786 + 5.716\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.786 |
| n |
5.716 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-02-03 00:00 |
01:57:50.37 |
+54:28:03.5 |
HIP 9181 |
8.08 |
| 2026-02-03 12:00 |
01:57:50.97 |
+54:27:46.1 |
HIP 9181 |
7.78 |
| 2026-02-04 00:00 |
01:57:51.58 |
+54:27:28.8 |
HIP 9181 |
7.47 |
| 2026-02-04 12:00 |
01:57:52.23 |
+54:27:11.5 |
HIP 9181 |
7.17 |
| 2026-02-05 00:00 |
01:57:52.89 |
+54:26:54.4 |
HIP 9181 |
6.87 |
| 2026-02-05 12:00 |
01:57:53.58 |
+54:26:37.4 |
HIP 9181 |
6.57 |
| 2026-02-06 00:00 |
01:57:54.30 |
+54:26:20.5 |
HIP 9181 |
6.27 |
| 2026-02-06 12:00 |
01:57:55.04 |
+54:26:03.6 |
HIP 9181 |
5.97 |
| 2026-02-07 00:00 |
01:57:55.80 |
+54:25:46.9 |
HIP 9181 |
5.67 |
| 2026-02-07 12:00 |
01:57:56.59 |
+54:25:30.3 |
HIP 9181 |
5.37 |
| 2026-02-08 00:00 |
01:57:57.40 |
+54:25:13.8 |
HIP 9181 |
5.07 |
| 2026-02-08 12:00 |
01:57:58.24 |
+54:24:57.4 |
HIP 9181 |
4.77 |
| 2026-02-09 00:00 |
01:57:59.10 |
+54:24:41.1 |
HIP 9181 |
4.47 |
| 2026-02-09 12:00 |
01:57:59.99 |
+54:24:24.9 |
HIP 9181 |
4.18 |
| 2026-02-10 00:00 |
01:58:00.89 |
+54:24:08.9 |
HIP 9181 |
3.88 |
| 2026-02-10 12:00 |
01:58:01.83 |
+54:23:52.9 |
HIP 9181 |
3.58 |
| 2026-02-11 00:00 |
01:58:02.78 |
+54:23:37.1 |
HIP 9181 |
3.28 |
| 2026-02-11 12:00 |
01:58:03.76 |
+54:23:21.4 |
HIP 9181 |
2.99 |
| 2026-02-12 00:00 |
01:58:04.76 |
+54:23:05.8 |
HIP 9181 |
2.69 |
| 2026-02-12 12:00 |
01:58:05.79 |
+54:22:50.3 |
HIP 9181 |
2.40 |
| 2026-02-13 00:00 |
01:58:06.84 |
+54:22:34.9 |
HIP 9181 |
2.11 |
| 2026-02-13 12:00 |
01:58:07.91 |
+54:22:19.7 |
HIP 9181 |
1.83 |
| 2026-02-14 00:00 |
01:58:09.01 |
+54:22:04.5 |
HIP 9181 |
1.55 |
| 2026-02-14 12:00 |
01:58:10.13 |
+54:21:49.5 |
HIP 9181 |
1.28 |
| 2026-02-15 00:00 |
01:58:11.27 |
+54:21:34.7 |
HIP 9181 |
1.03 |
| 2026-02-15 12:00 |
01:58:12.44 |
+54:21:19.9 |
HIP 9181 |
0.82 |
| 2026-02-16 00:00 |
01:58:13.62 |
+54:21:05.3 |
HIP 9181 |
0.68 |
| 2026-02-16 12:00 |
01:58:14.83 |
+54:20:50.8 |
HIP 9181 |
0.66 |
| 2026-02-17 00:00 |
01:58:16.07 |
+54:20:36.4 |
HIP 9181 |
0.77 |
| 2026-02-17 12:00 |
01:58:17.32 |
+54:20:22.1 |
HIP 9181 |
0.97 |
| 2026-02-18 00:00 |
01:58:18.60 |
+54:20:08.0 |
HIP 9181 |
1.21 |
| 2026-02-18 12:00 |
01:58:19.90 |
+54:19:54.0 |
HIP 9181 |
1.48 |
| 2026-02-19 00:00 |
01:58:21.22 |
+54:19:40.2 |
HIP 9181 |
1.76 |
| 2026-02-19 12:00 |
01:58:22.56 |
+54:19:26.4 |
HIP 9181 |
2.04 |
| 2026-02-20 00:00 |
01:58:23.93 |
+54:19:12.9 |
HIP 9181 |
2.33 |
| 2026-02-20 12:00 |
01:58:25.32 |
+54:18:59.4 |
HIP 9181 |
2.63 |
| 2026-02-21 00:00 |
01:58:26.72 |
+54:18:46.1 |
HIP 9181 |
2.93 |
| 2026-02-21 12:00 |
01:58:28.15 |
+54:18:32.9 |
HIP 9181 |
3.23 |
| 2026-02-22 00:00 |
01:58:29.60 |
+54:18:19.8 |
HIP 9181 |
3.53 |
| 2026-02-22 12:00 |
01:58:31.08 |
+54:18:06.9 |
HIP 9181 |
3.83 |
| 2026-02-23 00:00 |
01:58:32.57 |
+54:17:54.1 |
HIP 9181 |
4.13 |
| 2026-02-23 12:00 |
01:58:34.08 |
+54:17:41.5 |
HIP 9181 |
4.44 |
| 2026-02-24 00:00 |
01:58:35.62 |
+54:17:29.0 |
HIP 9181 |
4.74 |