P/2019 V2 (Groeller)
메타데이터
| 항목 |
값 |
| Designation |
P/2019 V2 (Groeller) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-10-20T05:08:35.226240Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:45:21Z |
| Obs used |
115 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
11.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-11-03T12:01:16.032000Z |
| Discovery magnitude (MPC) |
20.70 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-07-26.0000000 |
| e |
0.33232040 |
| q (au) |
5.020653 |
| a (au) |
7.519555 |
| i (deg) |
11.801180 |
| Ω (om, deg) |
189.184282 |
| ω (w, deg) |
336.046255 |
| M (ma, deg) |
355.879070 |
밝기
산란 + 전체 선형
$$
M_a = (6.254 + 5.539\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.254 |
| n |
5.539 |
| gf |
0.999 |
| gb |
-0.761 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:40:38.45 |
-10:56:06.4 |
HIP 96841 |
11.45 |
| 2026-02-03 12:00 |
19:40:54.54 |
-10:55:16.8 |
HIP 96841 |
10.47 |
| 2026-02-04 00:00 |
19:41:10.58 |
-10:54:27.0 |
HIP 96841 |
10.99 |
| 2026-02-04 12:00 |
19:41:26.60 |
-10:53:36.9 |
HIP 96841 |
12.82 |
| 2026-02-05 00:00 |
19:41:42.57 |
-10:52:46.6 |
HIP 96841 |
15.50 |
| 2026-02-05 12:00 |
19:41:58.51 |
-10:51:56.0 |
HIP 96841 |
18.65 |
| 2026-02-06 00:00 |
19:42:14.41 |
-10:51:05.1 |
HIP 97030 |
17.42 |
| 2026-02-06 12:00 |
19:42:30.27 |
-10:50:14.0 |
HIP 97030 |
13.87 |
| 2026-02-07 00:00 |
19:42:46.10 |
-10:49:22.7 |
HIP 97030 |
10.64 |
| 2026-02-07 12:00 |
19:43:01.88 |
-10:48:31.1 |
HIP 97030 |
8.11 |
| 2026-02-08 00:00 |
19:43:17.62 |
-10:47:39.3 |
HIP 97030 |
7.05 |
| 2026-02-08 12:00 |
19:43:33.33 |
-10:46:47.2 |
HIP 97030 |
8.06 |
| 2026-02-09 00:00 |
19:43:48.99 |
-10:45:55.0 |
HIP 97030 |
10.54 |
| 2026-02-09 12:00 |
19:44:04.61 |
-10:45:02.4 |
HIP 97030 |
13.72 |
| 2026-02-10 00:00 |
19:44:20.19 |
-10:44:09.7 |
HIP 97157 |
12.89 |
| 2026-02-10 12:00 |
19:44:35.72 |
-10:43:16.7 |
HIP 97157 |
10.02 |
| 2026-02-11 00:00 |
19:44:51.21 |
-10:42:23.5 |
HIP 97157 |
8.06 |
| 2026-02-11 12:00 |
19:45:06.65 |
-10:41:30.1 |
HIP 97157 |
7.76 |
| 2026-02-12 00:00 |
19:45:22.05 |
-10:40:36.5 |
HIP 97157 |
9.25 |
| 2026-02-12 12:00 |
19:45:37.41 |
-10:39:42.6 |
HIP 97157 |
11.87 |
| 2026-02-13 00:00 |
19:45:52.71 |
-10:38:48.6 |
HIP 97157 |
15.03 |
| 2026-02-13 12:00 |
19:46:07.97 |
-10:37:54.3 |
HIP 97157 |
18.45 |
| 2026-02-14 00:00 |
19:46:23.19 |
-10:36:59.9 |
HIP 97157 |
22.00 |
| 2026-02-14 12:00 |
19:46:38.35 |
-10:36:05.2 |
HIP 97157 |
25.63 |
| 2026-02-15 00:00 |
19:46:53.46 |
-10:35:10.3 |
HIP 97157 |
29.30 |
| 2026-02-15 12:00 |
19:47:08.53 |
-10:34:15.3 |
HIP 97353 |
30.83 |
| 2026-02-16 00:00 |
19:47:23.54 |
-10:33:20.0 |
HIP 97353 |
30.08 |
| 2026-02-16 12:00 |
19:47:38.50 |
-10:32:24.6 |
HIP 97499 |
28.56 |
| 2026-02-17 00:00 |
19:47:53.42 |
-10:31:28.9 |
HIP 97499 |
26.77 |
| 2026-02-17 12:00 |
19:48:08.27 |
-10:30:33.1 |
HIP 97499 |
25.41 |
| 2026-02-18 00:00 |
19:48:23.08 |
-10:29:37.1 |
HIP 97499 |
24.58 |
| 2026-02-18 12:00 |
19:48:37.83 |
-10:28:40.9 |
HIP 97568 |
23.32 |
| 2026-02-19 00:00 |
19:48:52.53 |
-10:27:44.6 |
HIP 97568 |
21.34 |
| 2026-02-19 12:00 |
19:49:07.17 |
-10:26:48.1 |
HIP 97568 |
19.89 |
| 2026-02-20 00:00 |
19:49:21.75 |
-10:25:51.4 |
HIP 97568 |
19.06 |
| 2026-02-20 12:00 |
19:49:36.28 |
-10:24:54.6 |
HIP 97568 |
18.95 |
| 2026-02-21 00:00 |
19:49:50.76 |
-10:23:57.6 |
HIP 97568 |
19.54 |
| 2026-02-21 12:00 |
19:50:05.17 |
-10:23:00.5 |
HIP 97568 |
20.79 |
| 2026-02-22 00:00 |
19:50:19.53 |
-10:22:03.2 |
HIP 97592 |
21.76 |
| 2026-02-22 12:00 |
19:50:33.83 |
-10:21:05.7 |
HIP 97592 |
21.50 |
| 2026-02-23 00:00 |
19:50:48.07 |
-10:20:08.1 |
HIP 97766 |
18.19 |
| 2026-02-23 12:00 |
19:51:02.24 |
-10:19:10.4 |
HIP 97766 |
14.81 |
| 2026-02-24 00:00 |
19:51:16.36 |
-10:18:12.5 |
HIP 97766 |
11.60 |