C/1983 N1 (IRAS)
メタデータ
| 項目 |
値 |
| Designation |
C/1983 N1 (IRAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1983-05-02T16:52:11.812800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
19 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1983-12-26.0000000 |
| e |
0.99936962 |
| q (au) |
2.418058 |
| a (au) |
3835.864208 |
| i (deg) |
138.832959 |
| Ω (om, deg) |
171.801181 |
| ω (w, deg) |
265.589825 |
| M (ma, deg) |
0.000984 |
等級
散乱 + 全体線形
$$
M_a = (15.018 + 2.142\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.018 |
| n |
2.142 |
| gf |
1.000 |
| gb |
-0.842 |
| k |
0.800 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
08:32:16.45 |
+56:49:22.1 |
HIP 41895 |
6.60 |
| 2026-02-03 12:00 |
08:32:13.16 |
+56:49:25.5 |
HIP 41895 |
6.83 |
| 2026-02-04 00:00 |
08:32:09.87 |
+56:49:28.8 |
HIP 41895 |
7.08 |
| 2026-02-04 12:00 |
08:32:06.59 |
+56:49:32.0 |
HIP 41895 |
7.34 |
| 2026-02-05 00:00 |
08:32:03.31 |
+56:49:35.0 |
HIP 41895 |
7.63 |
| 2026-02-05 12:00 |
08:32:00.03 |
+56:49:37.8 |
HIP 41895 |
7.92 |
| 2026-02-06 00:00 |
08:31:56.76 |
+56:49:40.4 |
HIP 41895 |
8.23 |
| 2026-02-06 12:00 |
08:31:53.50 |
+56:49:43.0 |
HIP 41895 |
8.54 |
| 2026-02-07 00:00 |
08:31:50.24 |
+56:49:45.3 |
HIP 41895 |
8.87 |
| 2026-02-07 12:00 |
08:31:46.99 |
+56:49:47.5 |
HIP 41895 |
9.20 |
| 2026-02-08 00:00 |
08:31:43.75 |
+56:49:49.5 |
HIP 41895 |
9.54 |
| 2026-02-08 12:00 |
08:31:40.51 |
+56:49:51.4 |
HIP 41895 |
9.89 |
| 2026-02-09 00:00 |
08:31:37.28 |
+56:49:53.1 |
HIP 41895 |
10.24 |
| 2026-02-09 12:00 |
08:31:34.05 |
+56:49:54.7 |
HIP 41895 |
10.60 |
| 2026-02-10 00:00 |
08:31:30.84 |
+56:49:56.1 |
HIP 41895 |
10.95 |
| 2026-02-10 12:00 |
08:31:27.63 |
+56:49:57.3 |
HIP 41895 |
11.32 |
| 2026-02-11 00:00 |
08:31:24.43 |
+56:49:58.4 |
HIP 41895 |
11.68 |
| 2026-02-11 12:00 |
08:31:21.23 |
+56:49:59.3 |
HIP 41895 |
12.05 |
| 2026-02-12 00:00 |
08:31:18.05 |
+56:50:00.1 |
HIP 41895 |
12.42 |
| 2026-02-12 12:00 |
08:31:14.87 |
+56:50:00.7 |
HIP 41895 |
12.79 |
| 2026-02-13 00:00 |
08:31:11.71 |
+56:50:01.1 |
HIP 41895 |
13.17 |
| 2026-02-13 12:00 |
08:31:08.55 |
+56:50:01.4 |
HIP 41895 |
13.54 |
| 2026-02-14 00:00 |
08:31:05.40 |
+56:50:01.5 |
HIP 41895 |
13.92 |
| 2026-02-14 12:00 |
08:31:02.27 |
+56:50:01.5 |
HIP 41895 |
14.29 |
| 2026-02-15 00:00 |
08:30:59.14 |
+56:50:01.3 |
HIP 41895 |
14.67 |
| 2026-02-15 12:00 |
08:30:56.02 |
+56:50:01.0 |
HIP 41895 |
15.05 |
| 2026-02-16 00:00 |
08:30:52.91 |
+56:50:00.4 |
HIP 41895 |
15.43 |
| 2026-02-16 12:00 |
08:30:49.82 |
+56:49:59.8 |
HIP 41895 |
15.80 |
| 2026-02-17 00:00 |
08:30:46.73 |
+56:49:59.0 |
HIP 41895 |
16.18 |
| 2026-02-17 12:00 |
08:30:43.66 |
+56:49:58.0 |
HIP 41895 |
16.56 |
| 2026-02-18 00:00 |
08:30:40.60 |
+56:49:56.8 |
HIP 41895 |
16.93 |
| 2026-02-18 12:00 |
08:30:37.55 |
+56:49:55.5 |
HIP 41607 |
17.13 |
| 2026-02-19 00:00 |
08:30:34.51 |
+56:49:54.1 |
HIP 41607 |
16.78 |
| 2026-02-19 12:00 |
08:30:31.49 |
+56:49:52.5 |
HIP 41607 |
16.43 |
| 2026-02-20 00:00 |
08:30:28.48 |
+56:49:50.7 |
HIP 41607 |
16.09 |
| 2026-02-20 12:00 |
08:30:25.48 |
+56:49:48.8 |
HIP 41607 |
15.74 |
| 2026-02-21 00:00 |
08:30:22.49 |
+56:49:46.7 |
HIP 41607 |
15.40 |
| 2026-02-21 12:00 |
08:30:19.52 |
+56:49:44.5 |
HIP 41607 |
15.06 |
| 2026-02-22 00:00 |
08:30:16.56 |
+56:49:42.1 |
HIP 41607 |
14.73 |
| 2026-02-22 12:00 |
08:30:13.61 |
+56:49:39.5 |
HIP 41607 |
14.40 |
| 2026-02-23 00:00 |
08:30:10.68 |
+56:49:36.8 |
HIP 41607 |
14.07 |
| 2026-02-23 12:00 |
08:30:07.76 |
+56:49:34.0 |
HIP 41607 |
13.75 |
| 2026-02-24 00:00 |
08:30:04.86 |
+56:49:31.0 |
HIP 41607 |
13.43 |