メタデータ
| 項目 |
値 |
| Designation |
C/2012 LP26 (Palomar) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-16T13:45:24.307200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:17Z |
| Obs used |
439 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
6.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-10-09.0000000 |
| e |
0.99927976 |
| q (au) |
6.536055 |
| a (au) |
9074.782001 |
| i (deg) |
25.379849 |
| Ω (om, deg) |
153.987248 |
| ω (w, deg) |
145.153210 |
| M (ma, deg) |
0.000061 |
等級
散乱 + 全体線形
$$
M_a = (8.956 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.956 |
| n |
2.000 |
| gf |
0.835 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
6.727 |
| 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) |
| 2026-09-20 00:00 |
03:59:46.60 |
-05:34:26.6 |
HIP 18606 |
14.87 |
| 2026-09-20 12:00 |
03:59:45.13 |
-05:35:01.4 |
HIP 18606 |
14.80 |
| 2026-09-21 00:00 |
03:59:43.62 |
-05:35:36.2 |
HIP 18606 |
14.75 |
| 2026-09-21 12:00 |
03:59:42.08 |
-05:36:11.1 |
HIP 18606 |
14.73 |
| 2026-09-22 00:00 |
03:59:40.49 |
-05:36:45.9 |
HIP 18606 |
14.73 |
| 2026-09-22 12:00 |
03:59:38.86 |
-05:37:20.7 |
HIP 18606 |
14.75 |
| 2026-09-23 00:00 |
03:59:37.19 |
-05:37:55.5 |
HIP 18606 |
14.81 |
| 2026-09-23 12:00 |
03:59:35.48 |
-05:38:30.3 |
HIP 18606 |
14.89 |
| 2026-09-24 00:00 |
03:59:33.74 |
-05:39:05.0 |
HIP 18606 |
14.99 |
| 2026-09-24 12:00 |
03:59:31.95 |
-05:39:39.8 |
HIP 18606 |
15.13 |
| 2026-09-25 00:00 |
03:59:30.13 |
-05:40:14.5 |
HIP 18606 |
15.29 |
| 2026-09-25 12:00 |
03:59:28.26 |
-05:40:49.2 |
HIP 18606 |
15.48 |
| 2026-09-26 00:00 |
03:59:26.36 |
-05:41:23.8 |
HIP 18606 |
15.69 |
| 2026-09-26 12:00 |
03:59:24.42 |
-05:41:58.4 |
HIP 18606 |
15.93 |
| 2026-09-27 00:00 |
03:59:22.45 |
-05:42:33.0 |
HIP 18606 |
16.20 |
| 2026-09-27 12:00 |
03:59:20.43 |
-05:43:07.5 |
HIP 18606 |
16.50 |
| 2026-09-28 00:00 |
03:59:18.38 |
-05:43:42.0 |
HIP 18606 |
16.82 |
| 2026-09-28 12:00 |
03:59:16.29 |
-05:44:16.4 |
HIP 18606 |
17.16 |
| 2026-09-29 00:00 |
03:59:14.16 |
-05:44:50.8 |
HIP 18606 |
17.53 |
| 2026-09-29 12:00 |
03:59:11.99 |
-05:45:25.1 |
HIP 18606 |
17.92 |
| 2026-09-30 00:00 |
03:59:09.79 |
-05:45:59.4 |
HIP 18606 |
18.33 |
| 2026-09-30 12:00 |
03:59:07.55 |
-05:46:33.6 |
HIP 18606 |
18.77 |
| 2026-10-01 00:00 |
03:59:05.27 |
-05:47:07.8 |
HIP 18606 |
19.23 |
| 2026-10-01 12:00 |
03:59:02.96 |
-05:47:41.9 |
HIP 18606 |
19.70 |
| 2026-10-02 00:00 |
03:59:00.61 |
-05:48:15.9 |
HIP 18606 |
20.20 |
| 2026-10-02 12:00 |
03:58:58.22 |
-05:48:49.9 |
HIP 18606 |
20.71 |
| 2026-10-03 00:00 |
03:58:55.80 |
-05:49:23.8 |
HIP 18606 |
21.24 |
| 2026-10-03 12:00 |
03:58:53.34 |
-05:49:57.6 |
HIP 18606 |
21.79 |
| 2026-10-04 00:00 |
03:58:50.84 |
-05:50:31.3 |
HIP 18606 |
22.35 |
| 2026-10-04 12:00 |
03:58:48.31 |
-05:51:05.0 |
HIP 18606 |
22.93 |
| 2026-10-05 00:00 |
03:58:45.75 |
-05:51:38.5 |
HIP 18606 |
23.53 |
| 2026-10-05 12:00 |
03:58:43.15 |
-05:52:12.0 |
HIP 18606 |
24.14 |
| 2026-10-06 00:00 |
03:58:40.51 |
-05:52:45.4 |
HIP 18606 |
24.76 |
| 2026-10-06 12:00 |
03:58:37.84 |
-05:53:18.7 |
HIP 18606 |
25.40 |
| 2026-10-07 00:00 |
03:58:35.14 |
-05:53:51.9 |
HIP 18606 |
26.05 |
| 2026-10-07 12:00 |
03:58:32.40 |
-05:54:25.0 |
HIP 18606 |
26.71 |
| 2026-10-08 00:00 |
03:58:29.62 |
-05:54:58.0 |
HIP 18606 |
27.39 |
| 2026-10-08 12:00 |
03:58:26.82 |
-05:55:30.9 |
HIP 18606 |
28.08 |
| 2026-10-09 00:00 |
03:58:23.98 |
-05:56:03.7 |
HIP 18606 |
28.77 |
| 2026-10-09 12:00 |
03:58:21.10 |
-05:56:36.4 |
HIP 18606 |
29.48 |
| 2026-10-10 00:00 |
03:58:18.20 |
-05:57:08.9 |
HIP 18606 |
30.20 |
| 2026-10-10 12:00 |
03:58:15.26 |
-05:57:41.4 |
HIP 18606 |
30.93 |
| 2026-10-11 00:00 |
03:58:12.29 |
-05:58:13.7 |
HIP 18606 |
31.67 |