P/2019 B2 (Groeller)
메타데이터
| 항목 |
값 |
| Designation |
P/2019 B2 (Groeller) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-06-08T00:39:50.480640Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:43:02Z |
| Obs used |
187 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
25.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-01-26T07:32:12.192000Z |
| Discovery magnitude (MPC) |
18.00 G |
| Discovery observatory (MPC) |
703 · Catalina Sky Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-03-01.0000000 |
| e |
0.37290156 |
| q (au) |
2.416517 |
| a (au) |
3.853490 |
| i (deg) |
16.829150 |
| Ω (om, deg) |
176.459298 |
| ω (w, deg) |
358.709921 |
| M (ma, deg) |
347.097338 |
밝기
산란 + 전체 선형
$$
M_a = (10.865 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.865 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.503 |
| 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 |
04:52:39.06 |
+02:01:50.1 |
HIP 22640 |
12.41 |
| 2026-02-03 12:00 |
04:52:37.44 |
+02:04:27.3 |
HIP 22640 |
14.60 |
| 2026-02-04 00:00 |
04:52:36.14 |
+02:07:05.5 |
HIP 22640 |
16.96 |
| 2026-02-04 12:00 |
04:52:35.15 |
+02:09:44.6 |
HIP 22640 |
19.43 |
| 2026-02-05 00:00 |
04:52:34.47 |
+02:12:24.6 |
HIP 22730 |
21.74 |
| 2026-02-05 12:00 |
04:52:34.09 |
+02:15:05.5 |
HIP 22730 |
19.62 |
| 2026-02-06 00:00 |
04:52:34.03 |
+02:17:47.3 |
HIP 22730 |
17.60 |
| 2026-02-06 12:00 |
04:52:34.28 |
+02:20:29.9 |
HIP 22730 |
15.70 |
| 2026-02-07 00:00 |
04:52:34.84 |
+02:23:13.4 |
HIP 22730 |
14.00 |
| 2026-02-07 12:00 |
04:52:35.71 |
+02:25:57.6 |
HIP 22730 |
12.60 |
| 2026-02-08 00:00 |
04:52:36.89 |
+02:28:42.7 |
HIP 22730 |
11.59 |
| 2026-02-08 12:00 |
04:52:38.38 |
+02:31:28.5 |
HIP 22730 |
11.13 |
| 2026-02-09 00:00 |
04:52:40.19 |
+02:34:15.1 |
HIP 22730 |
11.28 |
| 2026-02-09 12:00 |
04:52:42.30 |
+02:37:02.4 |
HIP 22730 |
12.04 |
| 2026-02-10 00:00 |
04:52:44.72 |
+02:39:50.5 |
HIP 22730 |
13.33 |
| 2026-02-10 12:00 |
04:52:47.45 |
+02:42:39.2 |
HIP 22730 |
15.02 |
| 2026-02-11 00:00 |
04:52:50.50 |
+02:45:28.6 |
HIP 22730 |
17.01 |
| 2026-02-11 12:00 |
04:52:53.85 |
+02:48:18.7 |
HIP 22730 |
19.22 |
| 2026-02-12 00:00 |
04:52:57.51 |
+02:51:09.4 |
HIP 22775 |
20.69 |
| 2026-02-12 12:00 |
04:53:01.48 |
+02:54:00.7 |
HIP 22775 |
18.02 |
| 2026-02-13 00:00 |
04:53:05.76 |
+02:56:52.6 |
HIP 22775 |
15.41 |
| 2026-02-13 12:00 |
04:53:10.34 |
+02:59:45.1 |
HIP 22775 |
12.92 |
| 2026-02-14 00:00 |
04:53:15.24 |
+03:02:38.2 |
HIP 22775 |
10.68 |
| 2026-02-14 12:00 |
04:53:20.44 |
+03:05:31.8 |
HIP 22775 |
8.91 |
| 2026-02-15 00:00 |
04:53:25.95 |
+03:08:25.9 |
HIP 22775 |
7.98 |
| 2026-02-15 12:00 |
04:53:31.77 |
+03:11:20.5 |
HIP 22775 |
8.23 |
| 2026-02-16 00:00 |
04:53:37.89 |
+03:14:15.6 |
HIP 22775 |
9.61 |
| 2026-02-16 12:00 |
04:53:44.31 |
+03:17:11.2 |
HIP 22775 |
11.77 |
| 2026-02-17 00:00 |
04:53:51.04 |
+03:20:07.1 |
HIP 22775 |
14.38 |
| 2026-02-17 12:00 |
04:53:58.08 |
+03:23:03.6 |
HIP 22775 |
17.27 |
| 2026-02-18 00:00 |
04:54:05.42 |
+03:26:00.4 |
HIP 22775 |
20.34 |
| 2026-02-18 12:00 |
04:54:13.06 |
+03:28:57.6 |
HIP 22775 |
23.55 |
| 2026-02-19 00:00 |
04:54:21.00 |
+03:31:55.1 |
HIP 22775 |
26.85 |
| 2026-02-19 12:00 |
04:54:29.24 |
+03:34:53.0 |
HIP 22775 |
30.24 |
| 2026-02-20 00:00 |
04:54:37.78 |
+03:37:51.3 |
HIP 22775 |
33.70 |
| 2026-02-20 12:00 |
04:54:46.62 |
+03:40:49.8 |
HIP 22775 |
37.23 |
| 2026-02-21 00:00 |
04:54:55.76 |
+03:43:48.6 |
HIP 22946 |
38.59 |
| 2026-02-21 12:00 |
04:55:05.20 |
+03:46:47.7 |
HIP 22946 |
40.12 |
| 2026-02-22 00:00 |
04:55:14.93 |
+03:49:47.1 |
HIP 23014 |
41.74 |
| 2026-02-22 12:00 |
04:55:24.96 |
+03:52:46.6 |
HIP 23014 |
42.69 |
| 2026-02-23 00:00 |
04:55:35.28 |
+03:55:46.4 |
HIP 23103 |
41.46 |
| 2026-02-23 12:00 |
04:55:45.89 |
+03:58:46.4 |
HIP 23103 |
38.10 |
| 2026-02-24 00:00 |
04:55:56.79 |
+04:01:46.5 |
HIP 23103 |
34.81 |