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) |
| 2026-06-01 00:00 |
16:50:12.84 |
-11:39:30.6 |
HIP 82409 |
20.95 |
| 2026-06-01 12:00 |
16:50:11.10 |
-11:39:27.4 |
HIP 82409 |
20.98 |
| 2026-06-02 00:00 |
16:50:09.36 |
-11:39:24.1 |
HIP 82409 |
21.02 |
| 2026-06-02 12:00 |
16:50:07.62 |
-11:39:21.0 |
HIP 82409 |
21.07 |
| 2026-06-03 00:00 |
16:50:05.88 |
-11:39:17.8 |
HIP 82409 |
21.13 |
| 2026-06-03 12:00 |
16:50:04.14 |
-11:39:14.7 |
HIP 82409 |
21.20 |
| 2026-06-04 00:00 |
16:50:02.40 |
-11:39:11.6 |
HIP 82409 |
21.28 |
| 2026-06-04 12:00 |
16:50:00.66 |
-11:39:08.6 |
HIP 82409 |
21.36 |
| 2026-06-05 00:00 |
16:49:58.92 |
-11:39:05.6 |
HIP 82409 |
21.46 |
| 2026-06-05 12:00 |
16:49:57.18 |
-11:39:02.6 |
HIP 82409 |
21.56 |
| 2026-06-06 00:00 |
16:49:55.43 |
-11:38:59.7 |
HIP 82409 |
21.67 |
| 2026-06-06 12:00 |
16:49:53.69 |
-11:38:56.8 |
HIP 82409 |
21.79 |
| 2026-06-07 00:00 |
16:49:51.95 |
-11:38:54.0 |
HIP 82409 |
21.92 |
| 2026-06-07 12:00 |
16:49:50.21 |
-11:38:51.2 |
HIP 82409 |
22.06 |
| 2026-06-08 00:00 |
16:49:48.48 |
-11:38:48.5 |
HIP 82409 |
22.20 |
| 2026-06-08 12:00 |
16:49:46.74 |
-11:38:45.7 |
HIP 82409 |
22.36 |
| 2026-06-09 00:00 |
16:49:45.00 |
-11:38:43.1 |
HIP 82409 |
22.52 |
| 2026-06-09 12:00 |
16:49:43.26 |
-11:38:40.4 |
HIP 82409 |
22.69 |
| 2026-06-10 00:00 |
16:49:41.53 |
-11:38:37.8 |
HIP 82409 |
22.86 |
| 2026-06-10 12:00 |
16:49:39.80 |
-11:38:35.3 |
HIP 82409 |
23.04 |
| 2026-06-11 00:00 |
16:49:38.06 |
-11:38:32.7 |
HIP 82409 |
23.23 |
| 2026-06-11 12:00 |
16:49:36.33 |
-11:38:30.3 |
HIP 82409 |
23.43 |
| 2026-06-12 00:00 |
16:49:34.60 |
-11:38:27.8 |
HIP 82409 |
23.63 |
| 2026-06-12 12:00 |
16:49:32.88 |
-11:38:25.5 |
HIP 82409 |
23.84 |
| 2026-06-13 00:00 |
16:49:31.15 |
-11:38:23.1 |
HIP 82409 |
24.05 |
| 2026-06-13 12:00 |
16:49:29.43 |
-11:38:20.8 |
HIP 82409 |
24.27 |
| 2026-06-14 00:00 |
16:49:27.71 |
-11:38:18.5 |
HIP 82409 |
24.50 |
| 2026-06-14 12:00 |
16:49:25.99 |
-11:38:16.3 |
HIP 82409 |
24.73 |
| 2026-06-15 00:00 |
16:49:24.27 |
-11:38:14.1 |
HIP 82409 |
24.96 |
| 2026-06-15 12:00 |
16:49:22.56 |
-11:38:12.0 |
HIP 82409 |
25.20 |
| 2026-06-16 00:00 |
16:49:20.85 |
-11:38:09.9 |
HIP 82409 |
25.45 |
| 2026-06-16 12:00 |
16:49:19.14 |
-11:38:07.9 |
HIP 82409 |
25.70 |
| 2026-06-17 00:00 |
16:49:17.43 |
-11:38:05.9 |
HIP 82409 |
25.95 |
| 2026-06-17 12:00 |
16:49:15.73 |
-11:38:03.9 |
HIP 82409 |
26.21 |
| 2026-06-18 00:00 |
16:49:14.03 |
-11:38:02.0 |
HIP 82409 |
26.48 |
| 2026-06-18 12:00 |
16:49:12.34 |
-11:38:00.1 |
HIP 82409 |
26.74 |
| 2026-06-19 00:00 |
16:49:10.65 |
-11:37:58.3 |
HIP 82409 |
27.01 |
| 2026-06-19 12:00 |
16:49:08.96 |
-11:37:56.5 |
HIP 82409 |
27.29 |
| 2026-06-20 00:00 |
16:49:07.27 |
-11:37:54.7 |
HIP 82409 |
27.57 |
| 2026-06-20 12:00 |
16:49:05.59 |
-11:37:53.0 |
HIP 82409 |
27.85 |
| 2026-06-21 00:00 |
16:49:03.91 |
-11:37:51.4 |
HIP 82409 |
28.13 |
| 2026-06-21 12:00 |
16:49:02.24 |
-11:37:49.8 |
HIP 82409 |
28.42 |
| 2026-06-22 00:00 |
16:49:00.57 |
-11:37:48.2 |
HIP 82409 |
28.71 |