P/1996 R2 (Lagerkvist)
メタデータ
| 項目 |
値 |
| Designation |
P/1996 R2 (Lagerkvist) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
1997-01-19T04:33:27.567360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:50Z |
| Obs used |
137 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
20.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1996-10-08.0000000 |
| e |
0.30999078 |
| q (au) |
2.609642 |
| a (au) |
3.782040 |
| i (deg) |
2.605342 |
| Ω (om, deg) |
40.240561 |
| ω (w, deg) |
334.042486 |
| M (ma, deg) |
346.172231 |
等級
散乱 + 全体線形
$$
M_a = (8.462 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.462 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| 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 |
22:18:07.51 |
-12:23:19.3 |
HIP 110065 |
11.48 |
| 2026-02-03 12:00 |
22:18:57.98 |
-12:18:22.2 |
HIP 110278 |
19.79 |
| 2026-02-04 00:00 |
22:19:48.48 |
-12:13:24.5 |
HIP 110278 |
6.79 |
| 2026-02-04 12:00 |
22:20:38.98 |
-12:08:26.0 |
HIP 110278 |
7.38 |
| 2026-02-05 00:00 |
22:21:29.51 |
-12:03:26.7 |
HIP 110375 |
7.88 |
| 2026-02-05 12:00 |
22:22:20.05 |
-11:58:26.8 |
HIP 110375 |
18.93 |
| 2026-02-06 00:00 |
22:23:10.61 |
-11:53:26.2 |
HIP 110620 |
28.12 |
| 2026-02-06 12:00 |
22:24:01.18 |
-11:48:24.9 |
HIP 110620 |
16.18 |
| 2026-02-07 00:00 |
22:24:51.77 |
-11:43:22.9 |
HIP 110620 |
9.47 |
| 2026-02-07 12:00 |
22:25:42.37 |
-11:38:20.2 |
HIP 110688 |
16.38 |
| 2026-02-08 00:00 |
22:26:32.98 |
-11:33:16.8 |
HIP 110786 |
19.70 |
| 2026-02-08 12:00 |
22:27:23.61 |
-11:28:12.7 |
HIP 110786 |
17.80 |
| 2026-02-09 00:00 |
22:28:14.26 |
-11:23:08.0 |
HIP 110786 |
24.59 |
| 2026-02-09 12:00 |
22:29:04.92 |
-11:18:02.6 |
HIP 111044 |
26.74 |
| 2026-02-10 00:00 |
22:29:55.59 |
-11:12:56.5 |
HIP 111044 |
30.02 |
| 2026-02-10 12:00 |
22:30:46.27 |
-11:07:49.8 |
HIP 111200 |
19.09 |
| 2026-02-11 00:00 |
22:31:36.97 |
-11:02:42.5 |
HIP 111200 |
8.45 |
| 2026-02-11 12:00 |
22:32:27.67 |
-10:57:34.5 |
HIP 111261 |
1.16 |
| 2026-02-12 00:00 |
22:33:18.39 |
-10:52:25.8 |
HIP 111261 |
13.32 |
| 2026-02-12 12:00 |
22:34:09.12 |
-10:47:16.5 |
HIP 111364 |
17.43 |
| 2026-02-13 00:00 |
22:34:59.87 |
-10:42:06.6 |
HIP 111364 |
22.19 |
| 2026-02-13 12:00 |
22:35:50.62 |
-10:36:56.1 |
HIP 111364 |
32.33 |
| 2026-02-14 00:00 |
22:36:41.38 |
-10:31:45.0 |
HIP 111822 |
42.17 |
| 2026-02-14 12:00 |
22:37:32.16 |
-10:26:33.3 |
HIP 111822 |
29.30 |
| 2026-02-15 00:00 |
22:38:22.94 |
-10:21:20.9 |
HIP 111822 |
17.44 |
| 2026-02-15 12:00 |
22:39:13.73 |
-10:16:08.0 |
HIP 111822 |
10.75 |
| 2026-02-16 00:00 |
22:40:04.53 |
-10:10:54.5 |
HIP 111843 |
15.09 |
| 2026-02-16 12:00 |
22:40:55.34 |
-10:05:40.4 |
HIP 112071 |
16.01 |
| 2026-02-17 00:00 |
22:41:46.16 |
-10:00:25.7 |
HIP 112071 |
7.87 |
| 2026-02-17 12:00 |
22:42:36.98 |
-09:55:10.5 |
HIP 112109 |
1.48 |
| 2026-02-18 00:00 |
22:43:27.81 |
-09:49:54.7 |
HIP 112109 |
14.94 |
| 2026-02-18 12:00 |
22:44:18.65 |
-09:44:38.3 |
HIP 112346 |
16.43 |
| 2026-02-19 00:00 |
22:45:09.50 |
-09:39:21.5 |
HIP 112346 |
2.87 |
| 2026-02-19 12:00 |
22:46:00.35 |
-09:34:04.0 |
HIP 112425 |
9.12 |
| 2026-02-20 00:00 |
22:46:51.20 |
-09:28:46.1 |
HIP 112425 |
15.32 |
| 2026-02-20 12:00 |
22:47:42.06 |
-09:23:27.6 |
HIP 112572 |
5.36 |
| 2026-02-21 00:00 |
22:48:32.93 |
-09:18:08.6 |
HIP 112572 |
10.59 |
| 2026-02-21 12:00 |
22:49:23.80 |
-09:12:49.1 |
HIP 112656 |
22.07 |
| 2026-02-22 00:00 |
22:50:14.67 |
-09:07:29.2 |
HIP 112849 |
18.62 |
| 2026-02-22 12:00 |
22:51:05.55 |
-09:02:08.7 |
HIP 112849 |
17.44 |
| 2026-02-23 00:00 |
22:51:56.43 |
-08:56:47.7 |
HIP 112899 |
23.41 |
| 2026-02-23 12:00 |
22:52:47.31 |
-08:51:26.3 |
HIP 113026 |
16.92 |
| 2026-02-24 00:00 |
22:53:38.19 |
-08:46:04.3 |
HIP 113026 |
19.77 |