メタデータ
| 項目 |
値 |
| Designation |
C/1879 Q1 (Palisa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1879-10-05T03:30:11.998080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:51Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1879-09-25.0000000 |
| e |
1.00000000 |
| q (au) |
0.989534 |
| a (au) |
- |
| i (deg) |
77.124284 |
| Ω (om, deg) |
88.875147 |
| ω (w, deg) |
115.480262 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-06-01 00:00 |
04:42:25.27 |
-48:02:35.3 |
HIP 21836 |
10.26 |
| 2026-06-01 12:00 |
04:42:26.40 |
-48:02:34.3 |
HIP 21836 |
10.41 |
| 2026-06-02 00:00 |
04:42:27.52 |
-48:02:33.4 |
HIP 21836 |
10.56 |
| 2026-06-02 12:00 |
04:42:28.64 |
-48:02:32.6 |
HIP 21836 |
10.71 |
| 2026-06-03 00:00 |
04:42:29.76 |
-48:02:31.8 |
HIP 21836 |
10.87 |
| 2026-06-03 12:00 |
04:42:30.88 |
-48:02:31.2 |
HIP 21836 |
11.02 |
| 2026-06-04 00:00 |
04:42:32.00 |
-48:02:30.6 |
HIP 21836 |
11.17 |
| 2026-06-04 12:00 |
04:42:33.12 |
-48:02:30.1 |
HIP 21836 |
11.32 |
| 2026-06-05 00:00 |
04:42:34.24 |
-48:02:29.8 |
HIP 21836 |
11.48 |
| 2026-06-05 12:00 |
04:42:35.36 |
-48:02:29.5 |
HIP 21836 |
11.63 |
| 2026-06-06 00:00 |
04:42:36.48 |
-48:02:29.3 |
HIP 21836 |
11.78 |
| 2026-06-06 12:00 |
04:42:37.60 |
-48:02:29.2 |
HIP 21836 |
11.94 |
| 2026-06-07 00:00 |
04:42:38.72 |
-48:02:29.1 |
HIP 21836 |
12.09 |
| 2026-06-07 12:00 |
04:42:39.84 |
-48:02:29.2 |
HIP 21836 |
12.24 |
| 2026-06-08 00:00 |
04:42:40.96 |
-48:02:29.4 |
HIP 21836 |
12.39 |
| 2026-06-08 12:00 |
04:42:42.08 |
-48:02:29.6 |
HIP 21836 |
12.55 |
| 2026-06-09 00:00 |
04:42:43.20 |
-48:02:29.9 |
HIP 21836 |
12.70 |
| 2026-06-09 12:00 |
04:42:44.31 |
-48:02:30.4 |
HIP 21836 |
12.85 |
| 2026-06-10 00:00 |
04:42:45.43 |
-48:02:30.9 |
HIP 21836 |
13.01 |
| 2026-06-10 12:00 |
04:42:46.54 |
-48:02:31.5 |
HIP 21836 |
13.16 |
| 2026-06-11 00:00 |
04:42:47.65 |
-48:02:32.2 |
HIP 21836 |
13.31 |
| 2026-06-11 12:00 |
04:42:48.76 |
-48:02:33.0 |
HIP 21836 |
13.46 |
| 2026-06-12 00:00 |
04:42:49.87 |
-48:02:33.8 |
HIP 21836 |
13.62 |
| 2026-06-12 12:00 |
04:42:50.98 |
-48:02:34.8 |
HIP 21836 |
13.77 |
| 2026-06-13 00:00 |
04:42:52.09 |
-48:02:35.9 |
HIP 21836 |
13.92 |
| 2026-06-13 12:00 |
04:42:53.20 |
-48:02:37.0 |
HIP 21836 |
14.07 |
| 2026-06-14 00:00 |
04:42:54.30 |
-48:02:38.2 |
HIP 21836 |
14.23 |
| 2026-06-14 12:00 |
04:42:55.40 |
-48:02:39.5 |
HIP 21836 |
14.38 |
| 2026-06-15 00:00 |
04:42:56.50 |
-48:02:41.0 |
HIP 21836 |
14.53 |
| 2026-06-15 12:00 |
04:42:57.60 |
-48:02:42.5 |
HIP 21836 |
14.68 |
| 2026-06-16 00:00 |
04:42:58.70 |
-48:02:44.0 |
HIP 21836 |
14.83 |
| 2026-06-16 12:00 |
04:42:59.80 |
-48:02:45.7 |
HIP 21836 |
14.98 |
| 2026-06-17 00:00 |
04:43:00.89 |
-48:02:47.5 |
HIP 21836 |
15.13 |
| 2026-06-17 12:00 |
04:43:01.98 |
-48:02:49.3 |
HIP 21836 |
15.28 |
| 2026-06-18 00:00 |
04:43:03.07 |
-48:02:51.3 |
HIP 21836 |
15.43 |
| 2026-06-18 12:00 |
04:43:04.16 |
-48:02:53.3 |
HIP 21836 |
15.58 |
| 2026-06-19 00:00 |
04:43:05.24 |
-48:02:55.4 |
HIP 21836 |
15.73 |
| 2026-06-19 12:00 |
04:43:06.32 |
-48:02:57.6 |
HIP 21836 |
15.88 |
| 2026-06-20 00:00 |
04:43:07.40 |
-48:03:00.0 |
HIP 21992 |
16.02 |
| 2026-06-20 12:00 |
04:43:08.48 |
-48:03:02.3 |
HIP 21992 |
15.93 |
| 2026-06-21 00:00 |
04:43:09.55 |
-48:03:04.8 |
HIP 21992 |
15.84 |
| 2026-06-21 12:00 |
04:43:10.62 |
-48:03:07.3 |
HIP 21992 |
15.75 |
| 2026-06-22 00:00 |
04:43:11.69 |
-48:03:10.0 |
HIP 21992 |
15.66 |