メタデータ
| 項目 |
値 |
| Designation |
C/1978 T1 (Seargent) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1978-09-14T20:22:48.953280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1978-10-15.0000000 |
| e |
0.99833325 |
| q (au) |
0.369876 |
| a (au) |
221.914124 |
| i (deg) |
67.828275 |
| Ω (om, deg) |
41.774963 |
| ω (w, deg) |
207.756634 |
| M (ma, deg) |
0.008989 |
等級
散乱 + 全体線形
$$
M_a = (8.252 + 3.969\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.252 |
| n |
3.969 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
02:47:29.42 |
+35:50:09.6 |
HIP 12982 |
10.87 |
| 2026-09-20 12:00 |
02:47:28.07 |
+35:50:11.2 |
HIP 12982 |
10.69 |
| 2026-09-21 00:00 |
02:47:26.71 |
+35:50:12.7 |
HIP 12982 |
10.52 |
| 2026-09-21 12:00 |
02:47:25.34 |
+35:50:14.1 |
HIP 12982 |
10.35 |
| 2026-09-22 00:00 |
02:47:23.95 |
+35:50:15.4 |
HIP 12982 |
10.18 |
| 2026-09-22 12:00 |
02:47:22.56 |
+35:50:16.6 |
HIP 12982 |
10.02 |
| 2026-09-23 00:00 |
02:47:21.15 |
+35:50:17.7 |
HIP 12982 |
9.87 |
| 2026-09-23 12:00 |
02:47:19.72 |
+35:50:18.7 |
HIP 12982 |
9.72 |
| 2026-09-24 00:00 |
02:47:18.29 |
+35:50:19.6 |
HIP 12982 |
9.58 |
| 2026-09-24 12:00 |
02:47:16.84 |
+35:50:20.5 |
HIP 12982 |
9.45 |
| 2026-09-25 00:00 |
02:47:15.39 |
+35:50:21.2 |
HIP 12982 |
9.33 |
| 2026-09-25 12:00 |
02:47:13.92 |
+35:50:21.9 |
HIP 12982 |
9.21 |
| 2026-09-26 00:00 |
02:47:12.44 |
+35:50:22.4 |
HIP 12982 |
9.10 |
| 2026-09-26 12:00 |
02:47:10.95 |
+35:50:22.9 |
HIP 12982 |
9.00 |
| 2026-09-27 00:00 |
02:47:09.44 |
+35:50:23.2 |
HIP 12982 |
8.92 |
| 2026-09-27 12:00 |
02:47:07.93 |
+35:50:23.5 |
HIP 12982 |
8.84 |
| 2026-09-28 00:00 |
02:47:06.41 |
+35:50:23.7 |
HIP 12982 |
8.77 |
| 2026-09-28 12:00 |
02:47:04.87 |
+35:50:23.8 |
HIP 12982 |
8.72 |
| 2026-09-29 00:00 |
02:47:03.32 |
+35:50:23.7 |
HIP 12982 |
8.68 |
| 2026-09-29 12:00 |
02:47:01.77 |
+35:50:23.6 |
HIP 12982 |
8.65 |
| 2026-09-30 00:00 |
02:47:00.20 |
+35:50:23.4 |
HIP 12982 |
8.63 |
| 2026-09-30 12:00 |
02:46:58.62 |
+35:50:23.1 |
HIP 12982 |
8.63 |
| 2026-10-01 00:00 |
02:46:57.03 |
+35:50:22.7 |
HIP 12982 |
8.64 |
| 2026-10-01 12:00 |
02:46:55.43 |
+35:50:22.2 |
HIP 12982 |
8.66 |
| 2026-10-02 00:00 |
02:46:53.82 |
+35:50:21.6 |
HIP 12982 |
8.70 |
| 2026-10-02 12:00 |
02:46:52.20 |
+35:50:21.0 |
HIP 12982 |
8.75 |
| 2026-10-03 00:00 |
02:46:50.58 |
+35:50:20.2 |
HIP 12982 |
8.81 |
| 2026-10-03 12:00 |
02:46:48.94 |
+35:50:19.3 |
HIP 12982 |
8.89 |
| 2026-10-04 00:00 |
02:46:47.29 |
+35:50:18.3 |
HIP 12982 |
8.99 |
| 2026-10-04 12:00 |
02:46:45.63 |
+35:50:17.3 |
HIP 12982 |
9.09 |
| 2026-10-05 00:00 |
02:46:43.96 |
+35:50:16.1 |
HIP 12982 |
9.21 |
| 2026-10-05 12:00 |
02:46:42.28 |
+35:50:14.9 |
HIP 12982 |
9.34 |
| 2026-10-06 00:00 |
02:46:40.60 |
+35:50:13.5 |
HIP 12982 |
9.49 |
| 2026-10-06 12:00 |
02:46:38.90 |
+35:50:12.1 |
HIP 12982 |
9.65 |
| 2026-10-07 00:00 |
02:46:37.19 |
+35:50:10.5 |
HIP 12982 |
9.81 |
| 2026-10-07 12:00 |
02:46:35.48 |
+35:50:08.9 |
HIP 12982 |
9.99 |
| 2026-10-08 00:00 |
02:46:33.76 |
+35:50:07.1 |
HIP 12982 |
10.19 |
| 2026-10-08 12:00 |
02:46:32.03 |
+35:50:05.3 |
HIP 12982 |
10.39 |
| 2026-10-09 00:00 |
02:46:30.29 |
+35:50:03.4 |
HIP 12982 |
10.60 |
| 2026-10-09 12:00 |
02:46:28.54 |
+35:50:01.4 |
HIP 12982 |
10.82 |
| 2026-10-10 00:00 |
02:46:26.78 |
+35:49:59.2 |
HIP 12982 |
11.05 |
| 2026-10-10 12:00 |
02:46:25.02 |
+35:49:57.0 |
HIP 12982 |
11.29 |
| 2026-10-11 00:00 |
02:46:23.24 |
+35:49:54.7 |
HIP 12982 |
11.54 |