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) |
| 2026-03-26 00:00 |
02:00:39.77 |
+54:09:32.9 |
HIP 9505 |
24.37 |
| 2026-03-26 12:00 |
02:00:42.27 |
+54:09:29.7 |
HIP 9505 |
24.20 |
| 2026-03-27 00:00 |
02:00:44.78 |
+54:09:26.8 |
HIP 9505 |
24.03 |
| 2026-03-27 12:00 |
02:00:47.31 |
+54:09:24.0 |
HIP 9505 |
23.86 |
| 2026-03-28 00:00 |
02:00:49.84 |
+54:09:21.3 |
HIP 9505 |
23.69 |
| 2026-03-28 12:00 |
02:00:52.38 |
+54:09:18.9 |
HIP 9505 |
23.53 |
| 2026-03-29 00:00 |
02:00:54.94 |
+54:09:16.5 |
HIP 9505 |
23.37 |
| 2026-03-29 12:00 |
02:00:57.50 |
+54:09:14.4 |
HIP 9505 |
23.21 |
| 2026-03-30 00:00 |
02:01:00.07 |
+54:09:12.4 |
HIP 9505 |
23.05 |
| 2026-03-30 12:00 |
02:01:02.65 |
+54:09:10.5 |
HIP 9505 |
22.89 |
| 2026-03-31 00:00 |
02:01:05.24 |
+54:09:08.9 |
HIP 9505 |
22.74 |
| 2026-03-31 12:00 |
02:01:07.84 |
+54:09:07.3 |
HIP 9505 |
22.59 |
| 2026-04-01 00:00 |
02:01:10.45 |
+54:09:06.0 |
HIP 9505 |
22.44 |
| 2026-04-01 12:00 |
02:01:13.06 |
+54:09:04.8 |
HIP 9505 |
22.29 |
| 2026-04-02 00:00 |
02:01:15.69 |
+54:09:03.7 |
HIP 9505 |
22.15 |
| 2026-04-02 12:00 |
02:01:18.32 |
+54:09:02.9 |
HIP 9505 |
22.00 |
| 2026-04-03 00:00 |
02:01:20.96 |
+54:09:02.2 |
HIP 9505 |
21.87 |
| 2026-04-03 12:00 |
02:01:23.61 |
+54:09:01.6 |
HIP 9505 |
21.73 |
| 2026-04-04 00:00 |
02:01:26.26 |
+54:09:01.2 |
HIP 9505 |
21.60 |
| 2026-04-04 12:00 |
02:01:28.93 |
+54:09:00.9 |
HIP 9505 |
21.47 |
| 2026-04-05 00:00 |
02:01:31.60 |
+54:09:00.9 |
HIP 9505 |
21.34 |
| 2026-04-05 12:00 |
02:01:34.27 |
+54:09:00.9 |
HIP 9505 |
21.22 |
| 2026-04-06 00:00 |
02:01:36.96 |
+54:09:01.2 |
HIP 9505 |
21.10 |
| 2026-04-06 12:00 |
02:01:39.65 |
+54:09:01.6 |
HIP 9505 |
20.99 |
| 2026-04-07 00:00 |
02:01:42.35 |
+54:09:02.1 |
HIP 9505 |
20.88 |
| 2026-04-07 12:00 |
02:01:45.05 |
+54:09:02.8 |
HIP 9505 |
20.77 |
| 2026-04-08 00:00 |
02:01:47.76 |
+54:09:03.7 |
HIP 9505 |
20.67 |
| 2026-04-08 12:00 |
02:01:50.48 |
+54:09:04.7 |
HIP 9505 |
20.57 |
| 2026-04-09 00:00 |
02:01:53.20 |
+54:09:05.9 |
HIP 9505 |
20.48 |
| 2026-04-09 12:00 |
02:01:55.92 |
+54:09:07.3 |
HIP 9505 |
20.39 |
| 2026-04-10 00:00 |
02:01:58.66 |
+54:09:08.8 |
HIP 9505 |
20.31 |
| 2026-04-10 12:00 |
02:02:01.39 |
+54:09:10.4 |
HIP 9505 |
20.23 |
| 2026-04-11 00:00 |
02:02:04.14 |
+54:09:12.2 |
HIP 9505 |
20.15 |
| 2026-04-11 12:00 |
02:02:06.88 |
+54:09:14.2 |
HIP 9505 |
20.08 |
| 2026-04-12 00:00 |
02:02:09.64 |
+54:09:16.3 |
HIP 9505 |
20.02 |
| 2026-04-12 12:00 |
02:02:12.39 |
+54:09:18.6 |
HIP 9505 |
19.96 |
| 2026-04-13 00:00 |
02:02:15.15 |
+54:09:21.0 |
HIP 9505 |
19.91 |
| 2026-04-13 12:00 |
02:02:17.92 |
+54:09:23.6 |
HIP 9505 |
19.86 |
| 2026-04-14 00:00 |
02:02:20.69 |
+54:09:26.4 |
HIP 9505 |
19.82 |
| 2026-04-14 12:00 |
02:02:23.46 |
+54:09:29.3 |
HIP 9505 |
19.78 |
| 2026-04-15 00:00 |
02:02:26.24 |
+54:09:32.3 |
HIP 9505 |
19.75 |
| 2026-04-15 12:00 |
02:02:29.02 |
+54:09:35.6 |
HIP 9505 |
19.72 |
| 2026-04-16 00:00 |
02:02:31.80 |
+54:09:38.9 |
HIP 9505 |
19.71 |