メタデータ
| 項目 |
値 |
| Designation |
127P/Holt-Olmstead |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-03-17T19:50:46.164480Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T12:45:51Z |
| Obs used |
912 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
20.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-09-11.0000000 |
| e |
0.36073210 |
| q (au) |
2.205851 |
| a (au) |
3.450589 |
| i (deg) |
14.302138 |
| Ω (om, deg) |
13.650879 |
| ω (w, deg) |
6.713731 |
| M (ma, deg) |
330.964573 |
等級
散乱 + 全体線形
$$
M_a = (11.432 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.432 |
| n |
6.000 |
| gf |
0.994 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.971 |
| 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) |
| 2026-07-29 00:00 |
13:34:59.14 |
-17:07:11.5 |
HIP 66319 |
14.01 |
| 2026-07-29 12:00 |
13:35:11.59 |
-17:08:13.2 |
HIP 66319 |
13.60 |
| 2026-07-30 00:00 |
13:35:24.21 |
-17:09:15.9 |
HIP 66319 |
13.93 |
| 2026-07-30 12:00 |
13:35:37.00 |
-17:10:19.6 |
HIP 66319 |
14.96 |
| 2026-07-31 00:00 |
13:35:49.96 |
-17:11:24.2 |
HIP 66319 |
16.60 |
| 2026-07-31 12:00 |
13:36:03.08 |
-17:12:29.8 |
HIP 66319 |
18.71 |
| 2026-08-01 00:00 |
13:36:16.37 |
-17:13:36.3 |
HIP 66319 |
21.16 |
| 2026-08-01 12:00 |
13:36:29.82 |
-17:14:43.8 |
HIP 66319 |
23.87 |
| 2026-08-02 00:00 |
13:36:43.44 |
-17:15:52.2 |
HIP 66319 |
26.78 |
| 2026-08-02 12:00 |
13:36:57.22 |
-17:17:01.6 |
HIP 66319 |
29.84 |
| 2026-08-03 00:00 |
13:37:11.16 |
-17:18:11.9 |
HIP 66319 |
33.03 |
| 2026-08-03 12:00 |
13:37:25.27 |
-17:19:23.2 |
HIP 66319 |
36.32 |
| 2026-08-04 00:00 |
13:37:39.54 |
-17:20:35.3 |
HIP 66319 |
39.69 |
| 2026-08-04 12:00 |
13:37:53.96 |
-17:21:48.4 |
HIP 66717 |
37.86 |
| 2026-08-05 00:00 |
13:38:08.55 |
-17:23:02.5 |
HIP 66717 |
34.44 |
| 2026-08-05 12:00 |
13:38:23.30 |
-17:24:17.4 |
HIP 66717 |
31.05 |
| 2026-08-06 00:00 |
13:38:38.20 |
-17:25:33.3 |
HIP 66717 |
27.72 |
| 2026-08-06 12:00 |
13:38:53.26 |
-17:26:50.0 |
HIP 66717 |
24.48 |
| 2026-08-07 00:00 |
13:39:08.48 |
-17:28:07.7 |
HIP 66717 |
21.41 |
| 2026-08-07 12:00 |
13:39:23.85 |
-17:29:26.3 |
HIP 66717 |
18.60 |
| 2026-08-08 00:00 |
13:39:39.38 |
-17:30:45.7 |
HIP 66717 |
16.23 |
| 2026-08-08 12:00 |
13:39:55.07 |
-17:32:06.1 |
HIP 66717 |
14.55 |
| 2026-08-09 00:00 |
13:40:10.90 |
-17:33:27.3 |
HIP 66717 |
13.83 |
| 2026-08-09 12:00 |
13:40:26.89 |
-17:34:49.4 |
HIP 66749 |
13.94 |
| 2026-08-10 00:00 |
13:40:43.04 |
-17:36:12.4 |
HIP 66749 |
11.50 |
| 2026-08-10 12:00 |
13:40:59.33 |
-17:37:36.3 |
HIP 66749 |
10.16 |
| 2026-08-11 00:00 |
13:41:15.78 |
-17:39:01.0 |
HIP 66749 |
10.42 |
| 2026-08-11 12:00 |
13:41:32.37 |
-17:40:26.6 |
HIP 66749 |
12.20 |
| 2026-08-12 00:00 |
13:41:49.12 |
-17:41:53.1 |
HIP 66749 |
15.01 |
| 2026-08-12 12:00 |
13:42:06.01 |
-17:43:20.4 |
HIP 66749 |
18.41 |
| 2026-08-13 00:00 |
13:42:23.05 |
-17:44:48.6 |
HIP 66749 |
22.15 |
| 2026-08-13 12:00 |
13:42:40.24 |
-17:46:17.5 |
HIP 66749 |
26.10 |
| 2026-08-14 00:00 |
13:42:57.57 |
-17:47:47.4 |
HIP 67060 |
23.85 |
| 2026-08-14 12:00 |
13:43:15.05 |
-17:49:18.0 |
HIP 67060 |
19.42 |
| 2026-08-15 00:00 |
13:43:32.67 |
-17:50:49.5 |
HIP 67060 |
14.96 |
| 2026-08-15 12:00 |
13:43:50.43 |
-17:52:21.8 |
HIP 67060 |
10.46 |
| 2026-08-16 00:00 |
13:44:08.34 |
-17:53:54.9 |
HIP 67060 |
5.93 |
| 2026-08-16 12:00 |
13:44:26.38 |
-17:55:28.8 |
HIP 67060 |
1.39 |
| 2026-08-17 00:00 |
13:44:44.57 |
-17:57:03.5 |
HIP 67060 |
3.26 |
| 2026-08-17 12:00 |
13:45:02.89 |
-17:58:39.0 |
HIP 67093 |
7.14 |
| 2026-08-18 00:00 |
13:45:21.35 |
-18:00:15.3 |
HIP 67093 |
6.52 |
| 2026-08-18 12:00 |
13:45:39.95 |
-18:01:52.4 |
HIP 67164 |
4.66 |
| 2026-08-19 00:00 |
13:45:58.69 |
-18:03:30.2 |
HIP 67164 |
5.79 |