C/1986 V1 (Sorrells)
メタデータ
| 項目 |
値 |
| Designation |
C/1986 V1 (Sorrells) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-03-09T15:47:46.700160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
360 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
13.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1987-02-24.0000000 |
| e |
0.99992595 |
| q (au) |
1.721158 |
| a (au) |
23244.336024 |
| i (deg) |
160.579825 |
| Ω (om, deg) |
74.802450 |
| ω (w, deg) |
70.233014 |
| M (ma, deg) |
359.999996 |
等級
散乱 + 全体線形
$$
M_a = (3.513 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.513 |
| n |
6.000 |
| 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 |
| 1986-11-02 |
1986-12-29 |
+9.0293 |
-2.780 |
| 1986-12-29 |
1987-02-28 |
-7.9512 |
+1.989 |
| 1987-04-11 |
1987-09-20 |
-0.2188 |
-0.090 |
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) |
| 2026-02-03 00:00 |
13:13:24.09 |
-24:06:18.8 |
HIP 64603 |
18.03 |
| 2026-02-03 12:00 |
13:13:23.25 |
-24:06:21.8 |
HIP 64603 |
18.15 |
| 2026-02-04 00:00 |
13:13:22.38 |
-24:06:24.7 |
HIP 64603 |
18.28 |
| 2026-02-04 12:00 |
13:13:21.50 |
-24:06:27.5 |
HIP 64603 |
18.42 |
| 2026-02-05 00:00 |
13:13:20.61 |
-24:06:30.2 |
HIP 64603 |
18.56 |
| 2026-02-05 12:00 |
13:13:19.70 |
-24:06:32.8 |
HIP 64603 |
18.71 |
| 2026-02-06 00:00 |
13:13:18.78 |
-24:06:35.3 |
HIP 64603 |
18.86 |
| 2026-02-06 12:00 |
13:13:17.84 |
-24:06:37.7 |
HIP 64603 |
19.02 |
| 2026-02-07 00:00 |
13:13:16.88 |
-24:06:39.9 |
HIP 64603 |
19.18 |
| 2026-02-07 12:00 |
13:13:15.91 |
-24:06:42.1 |
HIP 64603 |
19.35 |
| 2026-02-08 00:00 |
13:13:14.93 |
-24:06:44.1 |
HIP 64603 |
19.52 |
| 2026-02-08 12:00 |
13:13:13.93 |
-24:06:46.0 |
HIP 64603 |
19.70 |
| 2026-02-09 00:00 |
13:13:12.91 |
-24:06:47.8 |
HIP 64603 |
19.88 |
| 2026-02-09 12:00 |
13:13:11.88 |
-24:06:49.5 |
HIP 64603 |
20.07 |
| 2026-02-10 00:00 |
13:13:10.84 |
-24:06:51.1 |
HIP 64603 |
20.26 |
| 2026-02-10 12:00 |
13:13:09.78 |
-24:06:52.5 |
HIP 64603 |
20.46 |
| 2026-02-11 00:00 |
13:13:08.70 |
-24:06:53.9 |
HIP 64603 |
20.66 |
| 2026-02-11 12:00 |
13:13:07.61 |
-24:06:55.1 |
HIP 64603 |
20.86 |
| 2026-02-12 00:00 |
13:13:06.51 |
-24:06:56.2 |
HIP 64603 |
21.08 |
| 2026-02-12 12:00 |
13:13:05.39 |
-24:06:57.2 |
HIP 64603 |
21.29 |
| 2026-02-13 00:00 |
13:13:04.26 |
-24:06:58.1 |
HIP 64603 |
21.51 |
| 2026-02-13 12:00 |
13:13:03.11 |
-24:06:58.8 |
HIP 64603 |
21.74 |
| 2026-02-14 00:00 |
13:13:01.95 |
-24:06:59.5 |
HIP 64603 |
21.97 |
| 2026-02-14 12:00 |
13:13:00.77 |
-24:07:00.0 |
HIP 64603 |
22.20 |
| 2026-02-15 00:00 |
13:12:59.58 |
-24:07:00.4 |
HIP 64603 |
22.44 |
| 2026-02-15 12:00 |
13:12:58.38 |
-24:07:00.7 |
HIP 64603 |
22.69 |
| 2026-02-16 00:00 |
13:12:57.16 |
-24:07:00.9 |
HIP 64603 |
22.93 |
| 2026-02-16 12:00 |
13:12:55.93 |
-24:07:01.0 |
HIP 64603 |
23.19 |
| 2026-02-17 00:00 |
13:12:54.68 |
-24:07:00.9 |
HIP 64603 |
23.44 |
| 2026-02-17 12:00 |
13:12:53.42 |
-24:07:00.8 |
HIP 64603 |
23.70 |
| 2026-02-18 00:00 |
13:12:52.15 |
-24:07:00.5 |
HIP 64603 |
23.97 |
| 2026-02-18 12:00 |
13:12:50.87 |
-24:07:00.1 |
HIP 64603 |
24.24 |
| 2026-02-19 00:00 |
13:12:49.57 |
-24:06:59.6 |
HIP 64603 |
24.51 |
| 2026-02-19 12:00 |
13:12:48.25 |
-24:06:58.9 |
HIP 64603 |
24.79 |
| 2026-02-20 00:00 |
13:12:46.93 |
-24:06:58.2 |
HIP 64603 |
25.07 |
| 2026-02-20 12:00 |
13:12:45.59 |
-24:06:57.3 |
HIP 64603 |
25.36 |
| 2026-02-21 00:00 |
13:12:44.24 |
-24:06:56.3 |
HIP 64603 |
25.64 |
| 2026-02-21 12:00 |
13:12:42.88 |
-24:06:55.2 |
HIP 64603 |
25.94 |
| 2026-02-22 00:00 |
13:12:41.50 |
-24:06:54.0 |
HIP 64603 |
26.24 |
| 2026-02-22 12:00 |
13:12:40.11 |
-24:06:52.7 |
HIP 64303 |
26.13 |
| 2026-02-23 00:00 |
13:12:38.71 |
-24:06:51.3 |
HIP 64303 |
25.82 |
| 2026-02-23 12:00 |
13:12:37.29 |
-24:06:49.7 |
HIP 64303 |
25.51 |
| 2026-02-24 00:00 |
13:12:35.87 |
-24:06:48.0 |
HIP 64303 |
25.19 |