273P/Pons-Gambart
メタデータ
| 項目 |
値 |
| Designation |
273P/Pons-Gambart |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-12-19T16:06:04.144320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:12Z |
| Obs used |
1140 |
| NEO |
Yes |
| M1 |
11.300 |
| K1 |
8.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-03-18.0000000 |
| e |
0.97532437 |
| q (au) |
0.810159 |
| a (au) |
32.832346 |
| i (deg) |
136.396031 |
| Ω (om, deg) |
320.431172 |
| ω (w, deg) |
20.191912 |
| M (ma, deg) |
0.462759 |
等級
散乱 + 全体線形
$$
M_a = (12.697 + 5.779\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.697 |
| n |
5.779 |
| gf |
1.000 |
| gb |
-0.949 |
| k |
0.800 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2012-12-22 |
2013-01-27 |
-8.2349 |
-1.482 |
| 2013-01-27 |
2013-02-11 |
+1.7959 |
-1.599 |
| 2013-02-11 |
2013-03-04 |
+15.9199 |
-2.714 |
| 2013-03-04 |
2013-04-29 |
+2.7105 |
-0.831 |
| 2013-04-29 |
2014-04-04 |
-2.5470 |
+0.557 |
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) |
| 2026-02-03 00:00 |
09:12:15.13 |
+12:18:15.7 |
HIP 45216 |
10.15 |
| 2026-02-03 12:00 |
09:12:10.48 |
+12:18:34.4 |
HIP 45216 |
11.32 |
| 2026-02-04 00:00 |
09:12:05.83 |
+12:18:53.1 |
HIP 45216 |
12.50 |
| 2026-02-04 12:00 |
09:12:01.17 |
+12:19:11.8 |
HIP 45216 |
13.68 |
| 2026-02-05 00:00 |
09:11:56.52 |
+12:19:30.6 |
HIP 45216 |
14.85 |
| 2026-02-05 12:00 |
09:11:51.87 |
+12:19:49.4 |
HIP 45216 |
16.03 |
| 2026-02-06 00:00 |
09:11:47.22 |
+12:20:08.2 |
HIP 45216 |
17.21 |
| 2026-02-06 12:00 |
09:11:42.57 |
+12:20:27.1 |
HIP 45216 |
18.39 |
| 2026-02-07 00:00 |
09:11:37.93 |
+12:20:46.0 |
HIP 45216 |
19.56 |
| 2026-02-07 12:00 |
09:11:33.28 |
+12:21:04.9 |
HIP 45216 |
20.74 |
| 2026-02-08 00:00 |
09:11:28.64 |
+12:21:23.9 |
HIP 45216 |
21.92 |
| 2026-02-08 12:00 |
09:11:24.00 |
+12:21:42.8 |
HIP 45216 |
23.09 |
| 2026-02-09 00:00 |
09:11:19.36 |
+12:22:01.8 |
HIP 45216 |
24.27 |
| 2026-02-09 12:00 |
09:11:14.73 |
+12:22:20.8 |
HIP 45216 |
25.44 |
| 2026-02-10 00:00 |
09:11:10.10 |
+12:22:39.9 |
HIP 45216 |
26.62 |
| 2026-02-10 12:00 |
09:11:05.47 |
+12:22:58.9 |
HIP 45216 |
27.79 |
| 2026-02-11 00:00 |
09:11:00.85 |
+12:23:18.0 |
HIP 45028 |
28.73 |
| 2026-02-11 12:00 |
09:10:56.24 |
+12:23:37.0 |
HIP 45028 |
28.64 |
| 2026-02-12 00:00 |
09:10:51.63 |
+12:23:56.1 |
HIP 45028 |
28.60 |
| 2026-02-12 12:00 |
09:10:47.02 |
+12:24:15.2 |
HIP 45028 |
28.60 |
| 2026-02-13 00:00 |
09:10:42.42 |
+12:24:34.3 |
HIP 45028 |
28.66 |
| 2026-02-13 12:00 |
09:10:37.83 |
+12:24:53.4 |
HIP 45028 |
28.76 |
| 2026-02-14 00:00 |
09:10:33.24 |
+12:25:12.5 |
HIP 45028 |
28.91 |
| 2026-02-14 12:00 |
09:10:28.67 |
+12:25:31.6 |
HIP 45028 |
29.10 |
| 2026-02-15 00:00 |
09:10:24.10 |
+12:25:50.7 |
HIP 45028 |
29.34 |
| 2026-02-15 12:00 |
09:10:19.53 |
+12:26:09.8 |
HIP 45028 |
29.62 |
| 2026-02-16 00:00 |
09:10:14.98 |
+12:26:28.9 |
HIP 45028 |
29.95 |
| 2026-02-16 12:00 |
09:10:10.43 |
+12:26:48.0 |
HIP 45028 |
30.32 |
| 2026-02-17 00:00 |
09:10:05.90 |
+12:27:07.1 |
HIP 45028 |
30.72 |
| 2026-02-17 12:00 |
09:10:01.37 |
+12:27:26.2 |
HIP 45028 |
31.16 |
| 2026-02-18 00:00 |
09:09:56.86 |
+12:27:45.3 |
HIP 45028 |
31.64 |
| 2026-02-18 12:00 |
09:09:52.35 |
+12:28:04.3 |
HIP 45028 |
32.15 |
| 2026-02-19 00:00 |
09:09:47.86 |
+12:28:23.4 |
HIP 45028 |
32.69 |
| 2026-02-19 12:00 |
09:09:43.37 |
+12:28:42.4 |
HIP 45028 |
33.26 |
| 2026-02-20 00:00 |
09:09:38.90 |
+12:29:01.4 |
HIP 45028 |
33.86 |
| 2026-02-20 12:00 |
09:09:34.44 |
+12:29:20.4 |
HIP 45028 |
34.48 |
| 2026-02-21 00:00 |
09:09:29.99 |
+12:29:39.3 |
HIP 45028 |
35.13 |
| 2026-02-21 12:00 |
09:09:25.56 |
+12:29:58.3 |
HIP 45028 |
35.80 |
| 2026-02-22 00:00 |
09:09:21.14 |
+12:30:17.2 |
HIP 45028 |
36.50 |
| 2026-02-22 12:00 |
09:09:16.73 |
+12:30:36.1 |
HIP 44843 |
37.16 |
| 2026-02-23 00:00 |
09:09:12.33 |
+12:30:54.9 |
HIP 44843 |
37.01 |
| 2026-02-23 12:00 |
09:09:07.95 |
+12:31:13.8 |
HIP 44843 |
36.89 |
| 2026-02-24 00:00 |
09:09:03.59 |
+12:31:32.6 |
HIP 44843 |
36.81 |