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) |
| 2026-07-29 00:00 |
10:34:46.84 |
-57:23:14.0 |
HIP 51849 |
12.12 |
| 2026-07-29 12:00 |
10:34:49.45 |
-57:23:05.6 |
HIP 51849 |
12.06 |
| 2026-07-30 00:00 |
10:34:52.07 |
-57:22:57.5 |
HIP 51849 |
12.00 |
| 2026-07-30 12:00 |
10:34:54.70 |
-57:22:49.5 |
HIP 51849 |
11.95 |
| 2026-07-31 00:00 |
10:34:57.34 |
-57:22:41.7 |
HIP 51849 |
11.91 |
| 2026-07-31 12:00 |
10:35:00.00 |
-57:22:34.0 |
HIP 51849 |
11.88 |
| 2026-08-01 00:00 |
10:35:02.67 |
-57:22:26.6 |
HIP 51849 |
11.86 |
| 2026-08-01 12:00 |
10:35:05.34 |
-57:22:19.4 |
HIP 51849 |
11.84 |
| 2026-08-02 00:00 |
10:35:08.03 |
-57:22:12.3 |
HIP 51849 |
11.84 |
| 2026-08-02 12:00 |
10:35:10.73 |
-57:22:05.5 |
HIP 51849 |
11.84 |
| 2026-08-03 00:00 |
10:35:13.45 |
-57:21:58.8 |
HIP 51849 |
11.85 |
| 2026-08-03 12:00 |
10:35:16.17 |
-57:21:52.3 |
HIP 51849 |
11.87 |
| 2026-08-04 00:00 |
10:35:18.90 |
-57:21:46.1 |
HIP 51849 |
11.90 |
| 2026-08-04 12:00 |
10:35:21.65 |
-57:21:40.0 |
HIP 51849 |
11.93 |
| 2026-08-05 00:00 |
10:35:24.40 |
-57:21:34.1 |
HIP 51849 |
11.98 |
| 2026-08-05 12:00 |
10:35:27.16 |
-57:21:28.4 |
HIP 51849 |
12.03 |
| 2026-08-06 00:00 |
10:35:29.94 |
-57:21:22.9 |
HIP 51849 |
12.10 |
| 2026-08-06 12:00 |
10:35:32.72 |
-57:21:17.7 |
HIP 51849 |
12.17 |
| 2026-08-07 00:00 |
10:35:35.52 |
-57:21:12.6 |
HIP 51849 |
12.25 |
| 2026-08-07 12:00 |
10:35:38.32 |
-57:21:07.7 |
HIP 51849 |
12.34 |
| 2026-08-08 00:00 |
10:35:41.13 |
-57:21:03.0 |
HIP 51849 |
12.43 |
| 2026-08-08 12:00 |
10:35:43.96 |
-57:20:58.5 |
HIP 51849 |
12.54 |
| 2026-08-09 00:00 |
10:35:46.79 |
-57:20:54.2 |
HIP 51849 |
12.65 |
| 2026-08-09 12:00 |
10:35:49.63 |
-57:20:50.1 |
HIP 51849 |
12.77 |
| 2026-08-10 00:00 |
10:35:52.47 |
-57:20:46.2 |
HIP 51849 |
12.90 |
| 2026-08-10 12:00 |
10:35:55.33 |
-57:20:42.5 |
HIP 51849 |
13.03 |
| 2026-08-11 00:00 |
10:35:58.19 |
-57:20:39.0 |
HIP 51849 |
13.17 |
| 2026-08-11 12:00 |
10:36:01.07 |
-57:20:35.7 |
HIP 51849 |
13.32 |
| 2026-08-12 00:00 |
10:36:03.95 |
-57:20:32.6 |
HIP 51849 |
13.48 |
| 2026-08-12 12:00 |
10:36:06.84 |
-57:20:29.7 |
HIP 51849 |
13.64 |
| 2026-08-13 00:00 |
10:36:09.73 |
-57:20:27.0 |
HIP 51849 |
13.81 |
| 2026-08-13 12:00 |
10:36:12.63 |
-57:20:24.5 |
HIP 51849 |
13.98 |
| 2026-08-14 00:00 |
10:36:15.54 |
-57:20:22.2 |
HIP 51849 |
14.16 |
| 2026-08-14 12:00 |
10:36:18.46 |
-57:20:20.1 |
HIP 51849 |
14.35 |
| 2026-08-15 00:00 |
10:36:21.38 |
-57:20:18.3 |
HIP 52043 |
14.54 |
| 2026-08-15 12:00 |
10:36:24.31 |
-57:20:16.6 |
HIP 52043 |
14.16 |
| 2026-08-16 00:00 |
10:36:27.24 |
-57:20:15.1 |
HIP 52043 |
13.78 |
| 2026-08-16 12:00 |
10:36:30.19 |
-57:20:13.8 |
HIP 52043 |
13.40 |
| 2026-08-17 00:00 |
10:36:33.13 |
-57:20:12.8 |
HIP 52043 |
13.02 |
| 2026-08-17 12:00 |
10:36:36.08 |
-57:20:11.9 |
HIP 52043 |
12.65 |
| 2026-08-18 00:00 |
10:36:39.04 |
-57:20:11.2 |
HIP 52043 |
12.28 |
| 2026-08-18 12:00 |
10:36:42.00 |
-57:20:10.8 |
HIP 52043 |
11.91 |
| 2026-08-19 00:00 |
10:36:44.97 |
-57:20:10.5 |
HIP 52043 |
11.54 |