メタデータ
| 項目 |
値 |
| Designation |
13P/Olbers |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-06-30T17:39:58.435200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-12T09:29:25Z |
| Obs used |
2481 |
| NEO |
Yes |
| M1 |
6.900 |
| K1 |
18.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-09-30.0000000 |
| e |
0.92970999 |
| q (au) |
1.172573 |
| a (au) |
16.681923 |
| i (deg) |
44.624812 |
| Ω (om, deg) |
85.862691 |
| ω (w, deg) |
64.528341 |
| M (ma, deg) |
340.186016 |
等級
散乱 + 全体線形
$$
M_a = (6.030 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.030 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-08-13 |
2024-06-30 |
+9.7486 |
-3.048 |
| 2024-06-30 |
2025-07-31 |
-0.2116 |
-1.978 |
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) |
| 2026-05-12 00:00 |
19:30:54.85 |
-38:04:04.4 |
HIP 95956 |
3.44 |
| 2026-05-12 12:00 |
19:30:46.69 |
-38:06:00.7 |
HIP 95956 |
1.38 |
| 2026-05-13 00:00 |
19:30:38.36 |
-38:07:57.0 |
HIP 95956 |
2.19 |
| 2026-05-13 12:00 |
19:30:29.84 |
-38:09:53.4 |
HIP 95956 |
4.56 |
| 2026-05-14 00:00 |
19:30:21.15 |
-38:11:49.8 |
HIP 95956 |
7.10 |
| 2026-05-14 12:00 |
19:30:12.27 |
-38:13:46.2 |
HIP 95956 |
9.68 |
| 2026-05-15 00:00 |
19:30:03.21 |
-38:15:42.6 |
HIP 95956 |
12.31 |
| 2026-05-15 12:00 |
19:29:53.97 |
-38:17:39.0 |
HIP 95956 |
14.96 |
| 2026-05-16 00:00 |
19:29:44.55 |
-38:19:35.4 |
HIP 95736 |
16.36 |
| 2026-05-16 12:00 |
19:29:34.95 |
-38:21:31.8 |
HIP 95736 |
14.27 |
| 2026-05-17 00:00 |
19:29:25.18 |
-38:23:28.1 |
HIP 95736 |
12.39 |
| 2026-05-17 12:00 |
19:29:15.23 |
-38:25:24.4 |
HIP 95736 |
10.85 |
| 2026-05-18 00:00 |
19:29:05.10 |
-38:27:20.5 |
HIP 95736 |
9.82 |
| 2026-05-18 12:00 |
19:28:54.80 |
-38:29:16.7 |
HIP 95736 |
9.49 |
| 2026-05-19 00:00 |
19:28:44.32 |
-38:31:12.7 |
HIP 95736 |
9.95 |
| 2026-05-19 12:00 |
19:28:33.67 |
-38:33:08.6 |
HIP 95736 |
11.12 |
| 2026-05-20 00:00 |
19:28:22.85 |
-38:35:04.4 |
HIP 95736 |
12.82 |
| 2026-05-20 12:00 |
19:28:11.85 |
-38:37:00.0 |
HIP 95686 |
12.41 |
| 2026-05-21 00:00 |
19:28:00.69 |
-38:38:55.6 |
HIP 95686 |
9.80 |
| 2026-05-21 12:00 |
19:27:49.35 |
-38:40:50.9 |
HIP 95686 |
7.41 |
| 2026-05-22 00:00 |
19:27:37.85 |
-38:42:46.1 |
HIP 95686 |
5.57 |
| 2026-05-22 12:00 |
19:27:26.18 |
-38:44:41.2 |
HIP 95686 |
4.99 |
| 2026-05-23 00:00 |
19:27:14.35 |
-38:46:36.0 |
HIP 95686 |
6.06 |
| 2026-05-23 12:00 |
19:27:02.35 |
-38:48:30.6 |
HIP 95686 |
8.19 |
| 2026-05-24 00:00 |
19:26:50.19 |
-38:50:25.1 |
HIP 95615 |
9.21 |
| 2026-05-24 12:00 |
19:26:37.86 |
-38:52:19.3 |
HIP 95615 |
7.87 |
| 2026-05-25 00:00 |
19:26:25.37 |
-38:54:13.2 |
HIP 95615 |
7.64 |
| 2026-05-25 12:00 |
19:26:12.73 |
-38:56:06.9 |
HIP 95615 |
8.61 |
| 2026-05-26 00:00 |
19:25:59.92 |
-38:58:00.4 |
HIP 95615 |
10.48 |
| 2026-05-26 12:00 |
19:25:46.96 |
-38:59:53.6 |
HIP 95615 |
12.87 |
| 2026-05-27 00:00 |
19:25:33.84 |
-39:01:46.5 |
HIP 95615 |
15.57 |
| 2026-05-27 12:00 |
19:25:20.56 |
-39:03:39.1 |
HIP 95615 |
18.44 |
| 2026-05-28 00:00 |
19:25:07.13 |
-39:05:31.4 |
HIP 95326 |
18.07 |
| 2026-05-28 12:00 |
19:24:53.55 |
-39:07:23.4 |
HIP 95326 |
15.00 |
| 2026-05-29 00:00 |
19:24:39.81 |
-39:09:15.0 |
HIP 95326 |
11.98 |
| 2026-05-29 12:00 |
19:24:25.93 |
-39:11:06.3 |
HIP 95326 |
9.11 |
| 2026-05-30 00:00 |
19:24:11.90 |
-39:12:57.3 |
HIP 95326 |
6.58 |
| 2026-05-30 12:00 |
19:23:57.72 |
-39:14:47.8 |
HIP 95326 |
5.01 |
| 2026-05-31 00:00 |
19:23:43.39 |
-39:16:38.0 |
HIP 95326 |
5.35 |
| 2026-05-31 12:00 |
19:23:28.92 |
-39:18:27.9 |
HIP 95326 |
7.37 |
| 2026-06-01 00:00 |
19:23:14.30 |
-39:20:17.3 |
HIP 95326 |
10.13 |
| 2026-06-01 12:00 |
19:22:59.54 |
-39:22:06.3 |
HIP 95326 |
13.18 |
| 2026-06-02 00:00 |
19:22:44.65 |
-39:23:54.9 |
HIP 95326 |
16.38 |