メタデータ
| 項目 |
値 |
| Designation |
C/1984 V1 (Levy-Rudenko) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1984-12-14T06:08:07.969920Z |
| Orbit solution date (soln_date, UTC) |
2022-04-11T23:22:27Z |
| Obs used |
162 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
23.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1985-01-06.0000000 |
| e |
0.99921104 |
| q (au) |
0.917948 |
| a (au) |
1163.486000 |
| i (deg) |
65.714614 |
| Ω (om, deg) |
331.167739 |
| ω (w, deg) |
82.736865 |
| M (ma, deg) |
0.000565 |
等級
散乱 + 全体線形
$$
M_a = (8.012 + 3.636\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.012 |
| n |
3.636 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1984-11-15 |
1984-12-14 |
+10.1838 |
+0.326 |
| 1984-12-14 |
1985-02-19 |
-0.0916 |
-0.071 |
| 1985-02-19 |
1985-04-10 |
+14.5027 |
-2.757 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
10:32:01.64 |
-58:13:06.5 |
HIP 51676 |
11.16 |
| 2026-05-12 12:00 |
10:32:00.80 |
-58:12:42.2 |
HIP 51676 |
11.22 |
| 2026-05-13 00:00 |
10:31:59.98 |
-58:12:17.9 |
HIP 51676 |
11.29 |
| 2026-05-13 12:00 |
10:31:59.19 |
-58:11:53.6 |
HIP 51676 |
11.37 |
| 2026-05-14 00:00 |
10:31:58.42 |
-58:11:29.2 |
HIP 51676 |
11.46 |
| 2026-05-14 12:00 |
10:31:57.69 |
-58:11:04.9 |
HIP 51676 |
11.56 |
| 2026-05-15 00:00 |
10:31:56.97 |
-58:10:40.5 |
HIP 51676 |
11.68 |
| 2026-05-15 12:00 |
10:31:56.29 |
-58:10:16.1 |
HIP 51676 |
11.80 |
| 2026-05-16 00:00 |
10:31:55.63 |
-58:09:51.7 |
HIP 51676 |
11.93 |
| 2026-05-16 12:00 |
10:31:55.00 |
-58:09:27.3 |
HIP 51676 |
12.08 |
| 2026-05-17 00:00 |
10:31:54.39 |
-58:09:02.9 |
HIP 51676 |
12.23 |
| 2026-05-17 12:00 |
10:31:53.81 |
-58:08:38.5 |
HIP 51676 |
12.39 |
| 2026-05-18 00:00 |
10:31:53.26 |
-58:08:14.1 |
HIP 51676 |
12.56 |
| 2026-05-18 12:00 |
10:31:52.74 |
-58:07:49.6 |
HIP 51676 |
12.73 |
| 2026-05-19 00:00 |
10:31:52.24 |
-58:07:25.2 |
HIP 51676 |
12.92 |
| 2026-05-19 12:00 |
10:31:51.77 |
-58:07:00.8 |
HIP 51676 |
13.11 |
| 2026-05-20 00:00 |
10:31:51.32 |
-58:06:36.4 |
HIP 51676 |
13.31 |
| 2026-05-20 12:00 |
10:31:50.90 |
-58:06:12.0 |
HIP 51676 |
13.51 |
| 2026-05-21 00:00 |
10:31:50.51 |
-58:05:47.7 |
HIP 51676 |
13.72 |
| 2026-05-21 12:00 |
10:31:50.15 |
-58:05:23.3 |
HIP 51676 |
13.94 |
| 2026-05-22 00:00 |
10:31:49.81 |
-58:04:58.9 |
HIP 51676 |
14.16 |
| 2026-05-22 12:00 |
10:31:49.50 |
-58:04:34.6 |
HIP 51676 |
14.38 |
| 2026-05-23 00:00 |
10:31:49.21 |
-58:04:10.3 |
HIP 51676 |
14.61 |
| 2026-05-23 12:00 |
10:31:48.95 |
-58:03:46.0 |
HIP 51676 |
14.85 |
| 2026-05-24 00:00 |
10:31:48.72 |
-58:03:21.7 |
HIP 51676 |
15.09 |
| 2026-05-24 12:00 |
10:31:48.52 |
-58:02:57.4 |
HIP 51676 |
15.33 |
| 2026-05-25 00:00 |
10:31:48.34 |
-58:02:33.2 |
HIP 51676 |
15.58 |
| 2026-05-25 12:00 |
10:31:48.19 |
-58:02:09.0 |
HIP 51676 |
15.83 |
| 2026-05-26 00:00 |
10:31:48.06 |
-58:01:44.8 |
HIP 51676 |
16.08 |
| 2026-05-26 12:00 |
10:31:47.96 |
-58:01:20.7 |
HIP 51676 |
16.34 |
| 2026-05-27 00:00 |
10:31:47.89 |
-58:00:56.6 |
HIP 51676 |
16.60 |
| 2026-05-27 12:00 |
10:31:47.84 |
-58:00:32.5 |
HIP 51676 |
16.86 |
| 2026-05-28 00:00 |
10:31:47.82 |
-58:00:08.4 |
HIP 51676 |
17.12 |
| 2026-05-28 12:00 |
10:31:47.83 |
-57:59:44.4 |
HIP 51676 |
17.39 |
| 2026-05-29 00:00 |
10:31:47.86 |
-57:59:20.5 |
HIP 51676 |
17.66 |
| 2026-05-29 12:00 |
10:31:47.92 |
-57:58:56.5 |
HIP 51676 |
17.93 |
| 2026-05-30 00:00 |
10:31:48.01 |
-57:58:32.6 |
HIP 51676 |
18.20 |
| 2026-05-30 12:00 |
10:31:48.12 |
-57:58:08.8 |
HIP 51676 |
18.47 |
| 2026-05-31 00:00 |
10:31:48.26 |
-57:57:45.0 |
HIP 51676 |
18.75 |
| 2026-05-31 12:00 |
10:31:48.42 |
-57:57:21.2 |
HIP 51676 |
19.02 |
| 2026-06-01 00:00 |
10:31:48.61 |
-57:56:57.5 |
HIP 51676 |
19.30 |
| 2026-06-01 12:00 |
10:31:48.83 |
-57:56:33.9 |
HIP 51676 |
19.58 |
| 2026-06-02 00:00 |
10:31:49.07 |
-57:56:10.3 |
HIP 51676 |
19.86 |