メタデータ
| 項目 |
値 |
| Designation |
C/1977 V1 (Tsuchinshan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1977-07-24T20:21:58.737600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
69 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
10.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1978-01-05.0000000 |
| e |
0.99939607 |
| q (au) |
3.603189 |
| a (au) |
5966.223621 |
| i (deg) |
168.548706 |
| Ω (om, deg) |
5.287760 |
| ω (w, deg) |
318.178421 |
| M (ma, deg) |
0.000351 |
等級
散乱 + 全体線形
$$
M_a = (5.735 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.735 |
| n |
6.000 |
| gf |
0.978 |
| gb |
-0.700 |
| k |
0.810 |
| δ90 |
9.998 |
| 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 |
| 1977-11-08 |
1978-10-31 |
+17.3546 |
-10.143 |
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) |
| 2026-09-20 00:00 |
16:46:36.23 |
-11:44:30.4 |
HIP 82151 |
9.91 |
| 2026-09-20 12:00 |
16:46:36.59 |
-11:44:35.5 |
HIP 82151 |
9.93 |
| 2026-09-21 00:00 |
16:46:36.97 |
-11:44:40.7 |
HIP 82151 |
9.96 |
| 2026-09-21 12:00 |
16:46:37.36 |
-11:44:45.8 |
HIP 82151 |
9.98 |
| 2026-09-22 00:00 |
16:46:37.76 |
-11:44:50.9 |
HIP 82151 |
10.00 |
| 2026-09-22 12:00 |
16:46:38.18 |
-11:44:56.1 |
HIP 82151 |
10.02 |
| 2026-09-23 00:00 |
16:46:38.61 |
-11:45:01.2 |
HIP 82151 |
10.04 |
| 2026-09-23 12:00 |
16:46:39.06 |
-11:45:06.4 |
HIP 82151 |
10.07 |
| 2026-09-24 00:00 |
16:46:39.52 |
-11:45:11.6 |
HIP 82151 |
10.09 |
| 2026-09-24 12:00 |
16:46:39.99 |
-11:45:16.8 |
HIP 82151 |
10.12 |
| 2026-09-25 00:00 |
16:46:40.47 |
-11:45:22.0 |
HIP 82151 |
10.14 |
| 2026-09-25 12:00 |
16:46:40.97 |
-11:45:27.2 |
HIP 82151 |
10.17 |
| 2026-09-26 00:00 |
16:46:41.48 |
-11:45:32.5 |
HIP 82151 |
10.19 |
| 2026-09-26 12:00 |
16:46:42.01 |
-11:45:37.7 |
HIP 82151 |
10.22 |
| 2026-09-27 00:00 |
16:46:42.54 |
-11:45:43.0 |
HIP 82151 |
10.25 |
| 2026-09-27 12:00 |
16:46:43.10 |
-11:45:48.2 |
HIP 82151 |
10.28 |
| 2026-09-28 00:00 |
16:46:43.66 |
-11:45:53.5 |
HIP 82151 |
10.31 |
| 2026-09-28 12:00 |
16:46:44.24 |
-11:45:58.8 |
HIP 82151 |
10.34 |
| 2026-09-29 00:00 |
16:46:44.83 |
-11:46:04.1 |
HIP 82151 |
10.38 |
| 2026-09-29 12:00 |
16:46:45.43 |
-11:46:09.4 |
HIP 82151 |
10.42 |
| 2026-09-30 00:00 |
16:46:46.05 |
-11:46:14.7 |
HIP 82151 |
10.45 |
| 2026-09-30 12:00 |
16:46:46.68 |
-11:46:20.0 |
HIP 82151 |
10.50 |
| 2026-10-01 00:00 |
16:46:47.32 |
-11:46:25.3 |
HIP 82151 |
10.54 |
| 2026-10-01 12:00 |
16:46:47.97 |
-11:46:30.6 |
HIP 82151 |
10.58 |
| 2026-10-02 00:00 |
16:46:48.64 |
-11:46:36.0 |
HIP 82151 |
10.63 |
| 2026-10-02 12:00 |
16:46:49.32 |
-11:46:41.3 |
HIP 82151 |
10.68 |
| 2026-10-03 00:00 |
16:46:50.01 |
-11:46:46.6 |
HIP 82151 |
10.73 |
| 2026-10-03 12:00 |
16:46:50.72 |
-11:46:52.0 |
HIP 82151 |
10.79 |
| 2026-10-04 00:00 |
16:46:51.43 |
-11:46:57.3 |
HIP 82151 |
10.85 |
| 2026-10-04 12:00 |
16:46:52.17 |
-11:47:02.7 |
HIP 82151 |
10.91 |
| 2026-10-05 00:00 |
16:46:52.91 |
-11:47:08.1 |
HIP 82151 |
10.97 |
| 2026-10-05 12:00 |
16:46:53.66 |
-11:47:13.4 |
HIP 82151 |
11.04 |
| 2026-10-06 00:00 |
16:46:54.43 |
-11:47:18.8 |
HIP 82151 |
11.11 |
| 2026-10-06 12:00 |
16:46:55.21 |
-11:47:24.2 |
HIP 82151 |
11.18 |
| 2026-10-07 00:00 |
16:46:56.00 |
-11:47:29.5 |
HIP 82151 |
11.26 |
| 2026-10-07 12:00 |
16:46:56.81 |
-11:47:34.9 |
HIP 82151 |
11.34 |
| 2026-10-08 00:00 |
16:46:57.63 |
-11:47:40.3 |
HIP 82151 |
11.42 |
| 2026-10-08 12:00 |
16:46:58.45 |
-11:47:45.6 |
HIP 82151 |
11.51 |
| 2026-10-09 00:00 |
16:46:59.30 |
-11:47:51.0 |
HIP 82151 |
11.60 |
| 2026-10-09 12:00 |
16:47:00.15 |
-11:47:56.4 |
HIP 82151 |
11.69 |
| 2026-10-10 00:00 |
16:47:01.01 |
-11:48:01.8 |
HIP 82151 |
11.79 |
| 2026-10-10 12:00 |
16:47:01.89 |
-11:48:07.1 |
HIP 82151 |
11.89 |
| 2026-10-11 00:00 |
16:47:02.78 |
-11:48:12.5 |
HIP 82151 |
12.00 |