274P/Tombaugh-Tenagra
メタデータ
| 項目 |
値 |
| Designation |
274P/Tombaugh-Tenagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-02-23T13:58:11.107200Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:43:06Z |
| Obs used |
915 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
14.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-12-01.0000000 |
| e |
0.43970884 |
| q (au) |
2.445176 |
| a (au) |
4.364118 |
| i (deg) |
15.832722 |
| Ω (om, deg) |
81.368553 |
| ω (w, deg) |
38.590174 |
| M (ma, deg) |
109.234659 |
等級
散乱 + 全体線形
$$
M_a = (10.175 + 5.885\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.175 |
| n |
5.885 |
| gf |
1.000 |
| gb |
-0.893 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-02-03 00:00 |
19:28:50.04 |
-27:48:43.1 |
HIP 95887 |
21.94 |
| 2026-02-03 12:00 |
19:29:13.19 |
-27:48:25.6 |
HIP 95887 |
18.17 |
| 2026-02-04 00:00 |
19:29:36.28 |
-27:48:08.2 |
HIP 95887 |
15.21 |
| 2026-02-04 12:00 |
19:29:59.33 |
-27:47:50.9 |
HIP 95887 |
13.62 |
| 2026-02-05 00:00 |
19:30:22.33 |
-27:47:33.7 |
HIP 95887 |
13.84 |
| 2026-02-05 12:00 |
19:30:45.27 |
-27:47:16.6 |
HIP 95887 |
15.80 |
| 2026-02-06 00:00 |
19:31:08.16 |
-27:46:59.6 |
HIP 95887 |
18.95 |
| 2026-02-06 12:00 |
19:31:31.01 |
-27:46:42.6 |
HIP 96124 |
20.99 |
| 2026-02-07 00:00 |
19:31:53.79 |
-27:46:25.8 |
HIP 96124 |
17.89 |
| 2026-02-07 12:00 |
19:32:16.53 |
-27:46:09.1 |
HIP 96124 |
15.82 |
| 2026-02-08 00:00 |
19:32:39.21 |
-27:45:52.5 |
HIP 96124 |
15.21 |
| 2026-02-08 12:00 |
19:33:01.83 |
-27:45:36.1 |
HIP 96124 |
16.19 |
| 2026-02-09 00:00 |
19:33:24.40 |
-27:45:19.7 |
HIP 96124 |
18.52 |
| 2026-02-09 12:00 |
19:33:46.92 |
-27:45:03.5 |
HIP 96124 |
21.76 |
| 2026-02-10 00:00 |
19:34:09.37 |
-27:44:47.4 |
HIP 96332 |
22.06 |
| 2026-02-10 12:00 |
19:34:31.77 |
-27:44:31.4 |
HIP 96332 |
19.26 |
| 2026-02-11 00:00 |
19:34:54.10 |
-27:44:15.6 |
HIP 96332 |
17.47 |
| 2026-02-11 12:00 |
19:35:16.38 |
-27:44:00.0 |
HIP 96332 |
16.98 |
| 2026-02-12 00:00 |
19:35:38.60 |
-27:43:44.4 |
HIP 96332 |
17.90 |
| 2026-02-12 12:00 |
19:36:00.75 |
-27:43:29.0 |
HIP 96332 |
20.02 |
| 2026-02-13 00:00 |
19:36:22.84 |
-27:43:13.8 |
HIP 96332 |
23.00 |
| 2026-02-13 12:00 |
19:36:44.87 |
-27:42:58.7 |
HIP 96332 |
26.55 |
| 2026-02-14 00:00 |
19:37:06.83 |
-27:42:43.7 |
HIP 96332 |
30.46 |
| 2026-02-14 12:00 |
19:37:28.73 |
-27:42:29.0 |
HIP 96645 |
28.04 |
| 2026-02-15 00:00 |
19:37:50.56 |
-27:42:14.4 |
HIP 96645 |
24.73 |
| 2026-02-15 12:00 |
19:38:12.33 |
-27:42:00.0 |
HIP 96645 |
22.01 |
| 2026-02-16 00:00 |
19:38:34.03 |
-27:41:45.7 |
HIP 96645 |
20.10 |
| 2026-02-16 12:00 |
19:38:55.66 |
-27:41:31.6 |
HIP 96645 |
19.24 |
| 2026-02-17 00:00 |
19:39:17.22 |
-27:41:17.7 |
HIP 96645 |
19.56 |
| 2026-02-17 12:00 |
19:39:38.71 |
-27:41:04.0 |
HIP 96823 |
15.54 |
| 2026-02-18 00:00 |
19:40:00.13 |
-27:40:50.5 |
HIP 96823 |
10.82 |
| 2026-02-18 12:00 |
19:40:21.48 |
-27:40:37.2 |
HIP 96823 |
6.16 |
| 2026-02-19 00:00 |
19:40:42.75 |
-27:40:24.1 |
HIP 96823 |
1.89 |
| 2026-02-19 12:00 |
19:41:03.95 |
-27:40:11.2 |
HIP 96823 |
3.68 |
| 2026-02-20 00:00 |
19:41:25.08 |
-27:39:58.5 |
HIP 96823 |
8.21 |
| 2026-02-20 12:00 |
19:41:46.13 |
-27:39:46.0 |
HIP 96823 |
12.83 |
| 2026-02-21 00:00 |
19:42:07.10 |
-27:39:33.7 |
HIP 96823 |
17.46 |
| 2026-02-21 12:00 |
19:42:28.00 |
-27:39:21.7 |
HIP 96823 |
22.08 |
| 2026-02-22 00:00 |
19:42:48.82 |
-27:39:09.8 |
HIP 96823 |
26.69 |
| 2026-02-22 12:00 |
19:43:09.57 |
-27:38:58.2 |
HIP 96823 |
31.28 |
| 2026-02-23 00:00 |
19:43:30.23 |
-27:38:46.9 |
HIP 97195 |
27.64 |
| 2026-02-23 12:00 |
19:43:50.81 |
-27:38:35.7 |
HIP 97195 |
23.82 |
| 2026-02-24 00:00 |
19:44:11.32 |
-27:38:24.8 |
HIP 97195 |
20.32 |