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) |
| 2026-07-29 00:00 |
16:47:16.13 |
-11:37:58.0 |
HIP 82151 |
4.61 |
| 2026-07-29 12:00 |
16:47:15.07 |
-11:37:59.9 |
HIP 82151 |
4.38 |
| 2026-07-30 00:00 |
16:47:14.02 |
-11:38:01.7 |
HIP 82151 |
4.16 |
| 2026-07-30 12:00 |
16:47:12.98 |
-11:38:03.6 |
HIP 82151 |
3.95 |
| 2026-07-31 00:00 |
16:47:11.95 |
-11:38:05.6 |
HIP 82151 |
3.74 |
| 2026-07-31 12:00 |
16:47:10.94 |
-11:38:07.6 |
HIP 82151 |
3.54 |
| 2026-08-01 00:00 |
16:47:09.93 |
-11:38:09.6 |
HIP 82151 |
3.36 |
| 2026-08-01 12:00 |
16:47:08.94 |
-11:38:11.7 |
HIP 82151 |
3.18 |
| 2026-08-02 00:00 |
16:47:07.96 |
-11:38:13.8 |
HIP 82151 |
3.02 |
| 2026-08-02 12:00 |
16:47:06.99 |
-11:38:15.9 |
HIP 82151 |
2.87 |
| 2026-08-03 00:00 |
16:47:06.03 |
-11:38:18.1 |
HIP 82151 |
2.73 |
| 2026-08-03 12:00 |
16:47:05.09 |
-11:38:20.4 |
HIP 82151 |
2.62 |
| 2026-08-04 00:00 |
16:47:04.16 |
-11:38:22.7 |
HIP 82151 |
2.52 |
| 2026-08-04 12:00 |
16:47:03.24 |
-11:38:25.0 |
HIP 82151 |
2.44 |
| 2026-08-05 00:00 |
16:47:02.33 |
-11:38:27.4 |
HIP 82151 |
2.38 |
| 2026-08-05 12:00 |
16:47:01.43 |
-11:38:29.8 |
HIP 82151 |
2.34 |
| 2026-08-06 00:00 |
16:47:00.55 |
-11:38:32.2 |
HIP 82151 |
2.33 |
| 2026-08-06 12:00 |
16:46:59.68 |
-11:38:34.7 |
HIP 82151 |
2.34 |
| 2026-08-07 00:00 |
16:46:58.82 |
-11:38:37.2 |
HIP 82151 |
2.37 |
| 2026-08-07 12:00 |
16:46:57.97 |
-11:38:39.8 |
HIP 82151 |
2.41 |
| 2026-08-08 00:00 |
16:46:57.14 |
-11:38:42.4 |
HIP 82151 |
2.48 |
| 2026-08-08 12:00 |
16:46:56.31 |
-11:38:45.1 |
HIP 82151 |
2.56 |
| 2026-08-09 00:00 |
16:46:55.50 |
-11:38:47.8 |
HIP 82151 |
2.65 |
| 2026-08-09 12:00 |
16:46:54.71 |
-11:38:50.5 |
HIP 82151 |
2.76 |
| 2026-08-10 00:00 |
16:46:53.92 |
-11:38:53.3 |
HIP 82151 |
2.88 |
| 2026-08-10 12:00 |
16:46:53.15 |
-11:38:56.1 |
HIP 82151 |
3.00 |
| 2026-08-11 00:00 |
16:46:52.40 |
-11:38:58.9 |
HIP 82151 |
3.13 |
| 2026-08-11 12:00 |
16:46:51.65 |
-11:39:01.8 |
HIP 82151 |
3.26 |
| 2026-08-12 00:00 |
16:46:50.92 |
-11:39:04.8 |
HIP 82151 |
3.40 |
| 2026-08-12 12:00 |
16:46:50.20 |
-11:39:07.7 |
HIP 82151 |
3.54 |
| 2026-08-13 00:00 |
16:46:49.50 |
-11:39:10.7 |
HIP 82151 |
3.68 |
| 2026-08-13 12:00 |
16:46:48.80 |
-11:39:13.8 |
HIP 82151 |
3.83 |
| 2026-08-14 00:00 |
16:46:48.13 |
-11:39:16.9 |
HIP 82151 |
3.97 |
| 2026-08-14 12:00 |
16:46:47.46 |
-11:39:20.0 |
HIP 82151 |
4.12 |
| 2026-08-15 00:00 |
16:46:46.81 |
-11:39:23.1 |
HIP 82151 |
4.27 |
| 2026-08-15 12:00 |
16:46:46.17 |
-11:39:26.3 |
HIP 82151 |
4.41 |
| 2026-08-16 00:00 |
16:46:45.54 |
-11:39:29.6 |
HIP 82151 |
4.56 |
| 2026-08-16 12:00 |
16:46:44.93 |
-11:39:32.8 |
HIP 82151 |
4.70 |
| 2026-08-17 00:00 |
16:46:44.33 |
-11:39:36.1 |
HIP 82151 |
4.85 |
| 2026-08-17 12:00 |
16:46:43.75 |
-11:39:39.5 |
HIP 82151 |
4.99 |
| 2026-08-18 00:00 |
16:46:43.18 |
-11:39:42.8 |
HIP 82151 |
5.13 |
| 2026-08-18 12:00 |
16:46:42.62 |
-11:39:46.2 |
HIP 82151 |
5.27 |
| 2026-08-19 00:00 |
16:46:42.07 |
-11:39:49.7 |
HIP 82151 |
5.41 |