メタデータ
| 項目 |
値 |
| Designation |
C/2025 V2 (Rankin) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-03-22T23:09:30.444480Z |
| Orbit solution date (soln_date, UTC) |
2026-07-16T19:12:18Z |
| Obs used |
570 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
8.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-11-02T11:21:58.089600Z |
| Discovery magnitude (MPC) |
19.86 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2026-02-08.0000000 |
| e |
1.00068099 |
| q (au) |
1.952403 |
| a (au) |
-2867.016195 |
| i (deg) |
37.284422 |
| Ω (om, deg) |
138.082210 |
| ω (w, deg) |
102.714095 |
| M (ma, deg) |
-0.002619 |
等級
散乱 + 全体線形
$$
M_a = (8.827 + 3.739\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.827 |
| n |
3.739 |
| gf |
0.989 |
| gb |
-0.951 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
11:38:59.69 |
+17:45:23.5 |
HIP 56840 |
5.52 |
| 2026-09-20 12:00 |
11:39:50.76 |
+17:42:57.1 |
HIP 56882 |
11.67 |
| 2026-09-21 00:00 |
11:40:41.93 |
+17:40:30.6 |
HIP 56973 |
2.52 |
| 2026-09-21 12:00 |
11:41:33.21 |
+17:38:03.9 |
HIP 56973 |
12.29 |
| 2026-09-22 00:00 |
11:42:24.61 |
+17:35:37.0 |
HIP 56973 |
24.65 |
| 2026-09-22 12:00 |
11:43:16.11 |
+17:33:10.0 |
HIP 57224 |
13.65 |
| 2026-09-23 00:00 |
11:44:07.72 |
+17:30:42.9 |
HIP 57224 |
6.34 |
| 2026-09-23 12:00 |
11:44:59.45 |
+17:28:15.6 |
HIP 57224 |
14.49 |
| 2026-09-24 00:00 |
11:45:51.29 |
+17:25:48.1 |
HIP 57310 |
19.76 |
| 2026-09-24 12:00 |
11:46:43.24 |
+17:23:20.6 |
HIP 57310 |
27.40 |
| 2026-09-25 00:00 |
11:47:35.30 |
+17:20:52.9 |
HIP 57508 |
30.89 |
| 2026-09-25 12:00 |
11:48:27.47 |
+17:18:25.1 |
HIP 57651 |
28.91 |
| 2026-09-26 00:00 |
11:49:19.75 |
+17:15:57.1 |
HIP 57651 |
23.14 |
| 2026-09-26 12:00 |
11:50:12.15 |
+17:13:29.1 |
HIP 57651 |
23.67 |
| 2026-09-27 00:00 |
11:51:04.66 |
+17:11:01.0 |
HIP 57651 |
30.20 |
| 2026-09-27 12:00 |
11:51:57.28 |
+17:08:32.7 |
HIP 57952 |
24.89 |
| 2026-09-28 00:00 |
11:52:50.02 |
+17:06:04.4 |
HIP 57952 |
15.93 |
| 2026-09-28 12:00 |
11:53:42.88 |
+17:03:36.0 |
HIP 57952 |
14.79 |
| 2026-09-29 00:00 |
11:54:35.84 |
+17:01:07.5 |
HIP 57952 |
22.72 |
| 2026-09-29 12:00 |
11:55:28.92 |
+16:58:38.9 |
HIP 58205 |
14.38 |
| 2026-09-30 00:00 |
11:56:22.12 |
+16:56:10.3 |
HIP 58205 |
11.91 |
| 2026-09-30 12:00 |
11:57:15.43 |
+16:53:41.6 |
HIP 58205 |
20.34 |
| 2026-10-01 00:00 |
11:58:08.86 |
+16:51:12.8 |
HIP 58325 |
26.43 |
| 2026-10-01 12:00 |
11:59:02.41 |
+16:48:44.0 |
HIP 58537 |
21.32 |
| 2026-10-02 00:00 |
11:59:56.07 |
+16:46:15.1 |
HIP 58537 |
10.93 |
| 2026-10-02 12:00 |
12:00:49.85 |
+16:43:46.2 |
HIP 58537 |
11.28 |
| 2026-10-03 00:00 |
12:01:43.75 |
+16:41:17.2 |
HIP 58634 |
14.99 |
| 2026-10-03 12:00 |
12:02:37.76 |
+16:38:48.3 |
HIP 58634 |
24.02 |
| 2026-10-04 00:00 |
12:03:31.89 |
+16:36:19.3 |
HIP 58893 |
26.32 |
| 2026-10-04 12:00 |
12:04:26.14 |
+16:33:50.3 |
HIP 58893 |
18.12 |
| 2026-10-05 00:00 |
12:05:20.51 |
+16:31:21.4 |
HIP 59011 |
17.73 |
| 2026-10-05 12:00 |
12:06:14.99 |
+16:28:52.4 |
HIP 59011 |
17.87 |
| 2026-10-06 00:00 |
12:07:09.60 |
+16:26:23.5 |
HIP 59011 |
26.05 |
| 2026-10-06 12:00 |
12:08:04.32 |
+16:23:54.5 |
HIP 59274 |
20.94 |
| 2026-10-07 00:00 |
12:08:59.16 |
+16:21:25.7 |
HIP 59274 |
8.46 |
| 2026-10-07 12:00 |
12:09:54.12 |
+16:18:56.8 |
HIP 59334 |
6.39 |
| 2026-10-08 00:00 |
12:10:49.20 |
+16:16:28.0 |
HIP 59334 |
9.65 |
| 2026-10-08 12:00 |
12:11:44.40 |
+16:13:59.3 |
HIP 59535 |
14.64 |
| 2026-10-09 00:00 |
12:12:39.71 |
+16:11:30.7 |
HIP 59535 |
7.69 |
| 2026-10-09 12:00 |
12:13:35.15 |
+16:09:02.1 |
HIP 59535 |
16.43 |
| 2026-10-10 00:00 |
12:14:30.71 |
+16:06:33.7 |
HIP 59855 |
28.67 |
| 2026-10-10 12:00 |
12:15:26.38 |
+16:04:05.3 |
HIP 59855 |
15.08 |
| 2026-10-11 00:00 |
12:16:22.18 |
+16:01:37.0 |
HIP 59855 |
1.49 |