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) |
| 2026-05-12 00:00 |
02:45:09.81 |
+35:13:31.2 |
HIP 12776 |
13.64 |
| 2026-05-12 12:00 |
02:45:11.70 |
+35:13:39.3 |
HIP 12776 |
14.04 |
| 2026-05-13 00:00 |
02:45:13.58 |
+35:13:47.4 |
HIP 12776 |
14.44 |
| 2026-05-13 12:00 |
02:45:15.47 |
+35:13:55.6 |
HIP 12776 |
14.84 |
| 2026-05-14 00:00 |
02:45:17.35 |
+35:14:03.8 |
HIP 12776 |
15.25 |
| 2026-05-14 12:00 |
02:45:19.23 |
+35:14:12.2 |
HIP 12915 |
15.64 |
| 2026-05-15 00:00 |
02:45:21.10 |
+35:14:20.5 |
HIP 12915 |
15.31 |
| 2026-05-15 12:00 |
02:45:22.98 |
+35:14:28.9 |
HIP 12915 |
14.98 |
| 2026-05-16 00:00 |
02:45:24.85 |
+35:14:37.4 |
HIP 12915 |
14.65 |
| 2026-05-16 12:00 |
02:45:26.72 |
+35:14:45.9 |
HIP 12915 |
14.33 |
| 2026-05-17 00:00 |
02:45:28.58 |
+35:14:54.5 |
HIP 12915 |
14.01 |
| 2026-05-17 12:00 |
02:45:30.44 |
+35:15:03.2 |
HIP 12915 |
13.70 |
| 2026-05-18 00:00 |
02:45:32.30 |
+35:15:11.9 |
HIP 12915 |
13.39 |
| 2026-05-18 12:00 |
02:45:34.15 |
+35:15:20.6 |
HIP 12915 |
13.09 |
| 2026-05-19 00:00 |
02:45:36.00 |
+35:15:29.4 |
HIP 12915 |
12.79 |
| 2026-05-19 12:00 |
02:45:37.85 |
+35:15:38.2 |
HIP 12915 |
12.50 |
| 2026-05-20 00:00 |
02:45:39.69 |
+35:15:47.1 |
HIP 12915 |
12.21 |
| 2026-05-20 12:00 |
02:45:41.53 |
+35:15:56.1 |
HIP 12915 |
11.93 |
| 2026-05-21 00:00 |
02:45:43.37 |
+35:16:05.1 |
HIP 12915 |
11.66 |
| 2026-05-21 12:00 |
02:45:45.20 |
+35:16:14.1 |
HIP 12915 |
11.40 |
| 2026-05-22 00:00 |
02:45:47.02 |
+35:16:23.2 |
HIP 12915 |
11.14 |
| 2026-05-22 12:00 |
02:45:48.84 |
+35:16:32.3 |
HIP 12915 |
10.89 |
| 2026-05-23 00:00 |
02:45:50.66 |
+35:16:41.5 |
HIP 12915 |
10.65 |
| 2026-05-23 12:00 |
02:45:52.47 |
+35:16:50.7 |
HIP 12915 |
10.41 |
| 2026-05-24 00:00 |
02:45:54.28 |
+35:17:00.0 |
HIP 12915 |
10.19 |
| 2026-05-24 12:00 |
02:45:56.08 |
+35:17:09.3 |
HIP 12915 |
9.98 |
| 2026-05-25 00:00 |
02:45:57.88 |
+35:17:18.6 |
HIP 12915 |
9.78 |
| 2026-05-25 12:00 |
02:45:59.67 |
+35:17:28.0 |
HIP 12915 |
9.59 |
| 2026-05-26 00:00 |
02:46:01.45 |
+35:17:37.5 |
HIP 12915 |
9.41 |
| 2026-05-26 12:00 |
02:46:03.23 |
+35:17:47.0 |
HIP 12915 |
9.25 |
| 2026-05-27 00:00 |
02:46:05.01 |
+35:17:56.5 |
HIP 12915 |
9.10 |
| 2026-05-27 12:00 |
02:46:06.78 |
+35:18:06.1 |
HIP 12915 |
8.97 |
| 2026-05-28 00:00 |
02:46:08.54 |
+35:18:15.7 |
HIP 12915 |
8.84 |
| 2026-05-28 12:00 |
02:46:10.30 |
+35:18:25.3 |
HIP 12915 |
8.74 |
| 2026-05-29 00:00 |
02:46:12.05 |
+35:18:35.0 |
HIP 12915 |
8.65 |
| 2026-05-29 12:00 |
02:46:13.79 |
+35:18:44.7 |
HIP 12915 |
8.57 |
| 2026-05-30 00:00 |
02:46:15.53 |
+35:18:54.5 |
HIP 12915 |
8.52 |
| 2026-05-30 12:00 |
02:46:17.26 |
+35:19:04.2 |
HIP 12915 |
8.47 |
| 2026-05-31 00:00 |
02:46:18.99 |
+35:19:14.1 |
HIP 12915 |
8.45 |
| 2026-05-31 12:00 |
02:46:20.71 |
+35:19:23.9 |
HIP 12915 |
8.44 |
| 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 |