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 · University of Arizona 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 |
-0.998 |
| 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) |
| 2026-09-25 00:00 |
09:48:18.30 |
+04:08:47.3 |
HIP 48063 |
7.92 |
| 2026-09-25 12:00 |
09:49:07.38 |
+04:05:15.4 |
HIP 48063 |
20.48 |
| 2026-09-26 00:00 |
09:49:56.42 |
+04:01:43.1 |
HIP 48273 |
20.70 |
| 2026-09-26 12:00 |
09:50:45.43 |
+03:58:10.3 |
HIP 48273 |
22.77 |
| 2026-09-27 00:00 |
09:51:34.41 |
+03:54:37.1 |
HIP 48459 |
19.08 |
| 2026-09-27 12:00 |
09:52:23.35 |
+03:51:03.4 |
HIP 48459 |
7.30 |
| 2026-09-28 00:00 |
09:53:12.26 |
+03:47:29.3 |
HIP 48459 |
8.13 |
| 2026-09-28 12:00 |
09:54:01.14 |
+03:43:54.8 |
HIP 48459 |
20.05 |
| 2026-09-29 00:00 |
09:54:49.99 |
+03:40:19.9 |
HIP 48609 |
21.06 |
| 2026-09-29 12:00 |
09:55:38.80 |
+03:36:44.6 |
HIP 48772 |
27.74 |
| 2026-09-30 00:00 |
09:56:27.58 |
+03:33:08.8 |
HIP 48797 |
16.69 |
| 2026-09-30 12:00 |
09:57:16.32 |
+03:29:32.7 |
HIP 48797 |
9.91 |
| 2026-10-01 00:00 |
09:58:05.03 |
+03:25:56.3 |
HIP 48797 |
15.48 |
| 2026-10-01 12:00 |
09:58:53.70 |
+03:22:19.4 |
HIP 48990 |
12.36 |
| 2026-10-02 00:00 |
09:59:42.34 |
+03:18:42.2 |
HIP 48990 |
4.39 |
| 2026-10-02 12:00 |
10:00:30.94 |
+03:15:04.6 |
HIP 48990 |
14.37 |
| 2026-10-03 00:00 |
10:01:19.50 |
+03:11:26.7 |
HIP 48990 |
26.72 |
| 2026-10-03 12:00 |
10:02:08.03 |
+03:07:48.4 |
HIP 49329 |
30.37 |
| 2026-10-04 00:00 |
10:02:56.52 |
+03:04:09.8 |
HIP 49329 |
19.63 |
| 2026-10-04 12:00 |
10:03:44.97 |
+03:00:30.9 |
HIP 49329 |
12.97 |
| 2026-10-05 00:00 |
10:04:33.38 |
+02:56:51.7 |
HIP 49329 |
16.44 |
| 2026-10-05 12:00 |
10:05:21.76 |
+02:53:12.2 |
HIP 49544 |
24.21 |
| 2026-10-06 00:00 |
10:06:10.09 |
+02:49:32.4 |
HIP 49544 |
14.36 |
| 2026-10-06 12:00 |
10:06:58.38 |
+02:45:52.4 |
HIP 49544 |
12.01 |
| 2026-10-07 00:00 |
10:07:46.63 |
+02:42:12.1 |
HIP 49544 |
20.00 |
| 2026-10-07 12:00 |
10:08:34.84 |
+02:38:31.5 |
HIP 49756 |
20.31 |
| 2026-10-08 00:00 |
10:09:23.01 |
+02:34:50.7 |
HIP 49756 |
12.58 |
| 2026-10-08 12:00 |
10:10:11.14 |
+02:31:09.6 |
HIP 49777 |
12.81 |
| 2026-10-09 00:00 |
10:10:59.22 |
+02:27:28.3 |
HIP 49777 |
20.94 |
| 2026-10-09 12:00 |
10:11:47.25 |
+02:23:46.8 |
HIP 49777 |
32.05 |
| 2026-10-10 00:00 |
10:12:35.25 |
+02:20:05.2 |
HIP 50091 |
25.61 |
| 2026-10-10 12:00 |
10:13:23.19 |
+02:16:23.3 |
HIP 50091 |
24.09 |
| 2026-10-11 00:00 |
10:14:11.10 |
+02:12:41.3 |
HIP 50091 |
28.61 |
| 2026-10-11 12:00 |
10:14:58.95 |
+02:08:59.1 |
HIP 50351 |
33.30 |
| 2026-10-12 00:00 |
10:15:46.76 |
+02:05:16.7 |
HIP 50348 |
23.79 |
| 2026-10-12 12:00 |
10:16:34.52 |
+02:01:34.2 |
HIP 50348 |
14.36 |
| 2026-10-13 00:00 |
10:17:22.23 |
+01:57:51.6 |
HIP 50348 |
12.58 |
| 2026-10-13 12:00 |
10:18:09.90 |
+01:54:08.8 |
HIP 50348 |
20.54 |
| 2026-10-14 00:00 |
10:18:57.51 |
+01:50:25.9 |
HIP 50483 |
17.54 |
| 2026-10-14 12:00 |
10:19:45.08 |
+01:46:43.0 |
HIP 50483 |
22.38 |
| 2026-10-15 00:00 |
10:20:32.59 |
+01:43:00.0 |
HIP 50483 |
31.68 |
| 2026-10-15 12:00 |
10:21:20.06 |
+01:39:16.8 |
HIP 50811 |
19.90 |
| 2026-10-16 00:00 |
10:22:07.47 |
+01:35:33.6 |
HIP 50811 |
8.78 |