メタデータ
| 項目 |
値 |
| Designation |
C/1980 R1 (Russell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1981-03-06T03:48:13.415040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
17 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1980-10-13.0000000 |
| e |
1.00182492 |
| q (au) |
2.112445 |
| a (au) |
-1157.557626 |
| i (deg) |
128.706527 |
| Ω (om, deg) |
232.786557 |
| ω (w, deg) |
297.189306 |
| M (ma, deg) |
-0.003608 |
等級
散乱 + 全体線形
$$
M_a = (10.779 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.779 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
10:47:10.10 |
+63:58:40.5 |
HIP 52929 |
18.29 |
| 2026-06-01 12:00 |
10:47:09.98 |
+63:58:20.1 |
HIP 52929 |
18.11 |
| 2026-06-02 00:00 |
10:47:09.90 |
+63:57:59.6 |
HIP 52929 |
17.94 |
| 2026-06-02 12:00 |
10:47:09.84 |
+63:57:39.0 |
HIP 52929 |
17.77 |
| 2026-06-03 00:00 |
10:47:09.81 |
+63:57:18.5 |
HIP 52929 |
17.60 |
| 2026-06-03 12:00 |
10:47:09.82 |
+63:56:57.8 |
HIP 52929 |
17.44 |
| 2026-06-04 00:00 |
10:47:09.85 |
+63:56:37.2 |
HIP 52929 |
17.27 |
| 2026-06-04 12:00 |
10:47:09.91 |
+63:56:16.5 |
HIP 52929 |
17.11 |
| 2026-06-05 00:00 |
10:47:10.00 |
+63:55:55.8 |
HIP 52929 |
16.95 |
| 2026-06-05 12:00 |
10:47:10.13 |
+63:55:35.1 |
HIP 52929 |
16.79 |
| 2026-06-06 00:00 |
10:47:10.28 |
+63:55:14.3 |
HIP 52929 |
16.64 |
| 2026-06-06 12:00 |
10:47:10.46 |
+63:54:53.5 |
HIP 52929 |
16.49 |
| 2026-06-07 00:00 |
10:47:10.67 |
+63:54:32.7 |
HIP 52929 |
16.34 |
| 2026-06-07 12:00 |
10:47:10.91 |
+63:54:11.8 |
HIP 52929 |
16.19 |
| 2026-06-08 00:00 |
10:47:11.18 |
+63:53:51.0 |
HIP 52929 |
16.05 |
| 2026-06-08 12:00 |
10:47:11.48 |
+63:53:30.1 |
HIP 52929 |
15.91 |
| 2026-06-09 00:00 |
10:47:11.80 |
+63:53:09.2 |
HIP 52929 |
15.77 |
| 2026-06-09 12:00 |
10:47:12.16 |
+63:52:48.2 |
HIP 52929 |
15.64 |
| 2026-06-10 00:00 |
10:47:12.55 |
+63:52:27.3 |
HIP 52929 |
15.51 |
| 2026-06-10 12:00 |
10:47:12.96 |
+63:52:06.3 |
HIP 52929 |
15.38 |
| 2026-06-11 00:00 |
10:47:13.41 |
+63:51:45.3 |
HIP 52929 |
15.26 |
| 2026-06-11 12:00 |
10:47:13.88 |
+63:51:24.4 |
HIP 52929 |
15.14 |
| 2026-06-12 00:00 |
10:47:14.38 |
+63:51:03.3 |
HIP 52929 |
15.02 |
| 2026-06-12 12:00 |
10:47:14.92 |
+63:50:42.3 |
HIP 52929 |
14.91 |
| 2026-06-13 00:00 |
10:47:15.48 |
+63:50:21.3 |
HIP 52929 |
14.81 |
| 2026-06-13 12:00 |
10:47:16.07 |
+63:50:00.3 |
HIP 52929 |
14.71 |
| 2026-06-14 00:00 |
10:47:16.68 |
+63:49:39.3 |
HIP 52929 |
14.61 |
| 2026-06-14 12:00 |
10:47:17.33 |
+63:49:18.2 |
HIP 52929 |
14.52 |
| 2026-06-15 00:00 |
10:47:18.01 |
+63:48:57.2 |
HIP 52929 |
14.44 |
| 2026-06-15 12:00 |
10:47:18.71 |
+63:48:36.2 |
HIP 52929 |
14.36 |
| 2026-06-16 00:00 |
10:47:19.44 |
+63:48:15.1 |
HIP 52929 |
14.28 |
| 2026-06-16 12:00 |
10:47:20.20 |
+63:47:54.1 |
HIP 52929 |
14.21 |
| 2026-06-17 00:00 |
10:47:20.99 |
+63:47:33.1 |
HIP 52929 |
14.15 |
| 2026-06-17 12:00 |
10:47:21.81 |
+63:47:12.0 |
HIP 52929 |
14.09 |
| 2026-06-18 00:00 |
10:47:22.66 |
+63:46:51.0 |
HIP 52929 |
14.04 |
| 2026-06-18 12:00 |
10:47:23.53 |
+63:46:30.0 |
HIP 52929 |
13.99 |
| 2026-06-19 00:00 |
10:47:24.43 |
+63:46:09.0 |
HIP 52929 |
13.95 |
| 2026-06-19 12:00 |
10:47:25.36 |
+63:45:48.1 |
HIP 52929 |
13.92 |
| 2026-06-20 00:00 |
10:47:26.32 |
+63:45:27.1 |
HIP 52929 |
13.89 |
| 2026-06-20 12:00 |
10:47:27.30 |
+63:45:06.1 |
HIP 52929 |
13.87 |
| 2026-06-21 00:00 |
10:47:28.31 |
+63:44:45.2 |
HIP 52929 |
13.86 |
| 2026-06-21 12:00 |
10:47:29.35 |
+63:44:24.3 |
HIP 52929 |
13.85 |
| 2026-06-22 00:00 |
10:47:30.42 |
+63:44:03.4 |
HIP 52929 |
13.85 |