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) |
| 2026-06-01 00:00 |
02:46:22.42 |
+35:19:33.8 |
HIP 12915 |
8.45 |
| 2026-06-01 12:00 |
02:46:24.12 |
+35:19:43.8 |
HIP 12915 |
8.47 |
| 2026-06-02 00:00 |
02:46:25.82 |
+35:19:53.7 |
HIP 12915 |
8.51 |
| 2026-06-02 12:00 |
02:46:27.51 |
+35:20:03.7 |
HIP 12915 |
8.57 |
| 2026-06-03 00:00 |
02:46:29.20 |
+35:20:13.8 |
HIP 12915 |
8.64 |
| 2026-06-03 12:00 |
02:46:30.87 |
+35:20:23.8 |
HIP 12915 |
8.73 |
| 2026-06-04 00:00 |
02:46:32.54 |
+35:20:33.9 |
HIP 12915 |
8.83 |
| 2026-06-04 12:00 |
02:46:34.20 |
+35:20:44.1 |
HIP 12915 |
8.94 |
| 2026-06-05 00:00 |
02:46:35.86 |
+35:20:54.2 |
HIP 12915 |
9.07 |
| 2026-06-05 12:00 |
02:46:37.50 |
+35:21:04.4 |
HIP 12915 |
9.21 |
| 2026-06-06 00:00 |
02:46:39.14 |
+35:21:14.6 |
HIP 12915 |
9.36 |
| 2026-06-06 12:00 |
02:46:40.77 |
+35:21:24.9 |
HIP 12915 |
9.52 |
| 2026-06-07 00:00 |
02:46:42.39 |
+35:21:35.1 |
HIP 12915 |
9.69 |
| 2026-06-07 12:00 |
02:46:44.01 |
+35:21:45.4 |
HIP 12915 |
9.87 |
| 2026-06-08 00:00 |
02:46:45.61 |
+35:21:55.8 |
HIP 12915 |
10.06 |
| 2026-06-08 12:00 |
02:46:47.21 |
+35:22:06.1 |
HIP 12915 |
10.26 |
| 2026-06-09 00:00 |
02:46:48.80 |
+35:22:16.5 |
HIP 12915 |
10.47 |
| 2026-06-09 12:00 |
02:46:50.38 |
+35:22:26.9 |
HIP 12915 |
10.68 |
| 2026-06-10 00:00 |
02:46:51.95 |
+35:22:37.3 |
HIP 12915 |
10.90 |
| 2026-06-10 12:00 |
02:46:53.52 |
+35:22:47.8 |
HIP 12990 |
10.69 |
| 2026-06-11 00:00 |
02:46:55.07 |
+35:22:58.2 |
HIP 12990 |
10.46 |
| 2026-06-11 12:00 |
02:46:56.62 |
+35:23:08.7 |
HIP 12990 |
10.24 |
| 2026-06-12 00:00 |
02:46:58.15 |
+35:23:19.3 |
HIP 12990 |
10.03 |
| 2026-06-12 12:00 |
02:46:59.68 |
+35:23:29.8 |
HIP 12990 |
9.82 |
| 2026-06-13 00:00 |
02:47:01.20 |
+35:23:40.3 |
HIP 12990 |
9.63 |
| 2026-06-13 12:00 |
02:47:02.70 |
+35:23:50.9 |
HIP 12990 |
9.44 |
| 2026-06-14 00:00 |
02:47:04.20 |
+35:24:01.5 |
HIP 12990 |
9.26 |
| 2026-06-14 12:00 |
02:47:05.69 |
+35:24:12.1 |
HIP 12990 |
9.10 |
| 2026-06-15 00:00 |
02:47:07.17 |
+35:24:22.7 |
HIP 12990 |
8.94 |
| 2026-06-15 12:00 |
02:47:08.64 |
+35:24:33.4 |
HIP 12990 |
8.79 |
| 2026-06-16 00:00 |
02:47:10.09 |
+35:24:44.0 |
HIP 12990 |
8.66 |
| 2026-06-16 12:00 |
02:47:11.54 |
+35:24:54.7 |
HIP 12990 |
8.53 |
| 2026-06-17 00:00 |
02:47:12.98 |
+35:25:05.4 |
HIP 12990 |
8.42 |
| 2026-06-17 12:00 |
02:47:14.41 |
+35:25:16.1 |
HIP 12990 |
8.32 |
| 2026-06-18 00:00 |
02:47:15.82 |
+35:25:26.8 |
HIP 12990 |
8.23 |
| 2026-06-18 12:00 |
02:47:17.23 |
+35:25:37.5 |
HIP 12990 |
8.15 |
| 2026-06-19 00:00 |
02:47:18.62 |
+35:25:48.2 |
HIP 12990 |
8.09 |
| 2026-06-19 12:00 |
02:47:20.01 |
+35:25:59.0 |
HIP 12990 |
8.03 |
| 2026-06-20 00:00 |
02:47:21.38 |
+35:26:09.7 |
HIP 12990 |
7.99 |
| 2026-06-20 12:00 |
02:47:22.74 |
+35:26:20.5 |
HIP 12990 |
7.97 |
| 2026-06-21 00:00 |
02:47:24.10 |
+35:26:31.2 |
HIP 12990 |
7.95 |
| 2026-06-21 12:00 |
02:47:25.44 |
+35:26:42.0 |
HIP 12990 |
7.95 |
| 2026-06-22 00:00 |
02:47:26.76 |
+35:26:52.8 |
HIP 12990 |
7.96 |