메타데이터
| 항목 |
값 |
| Designation |
P/2020 R5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-05-28T02:51:58.855680Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:23Z |
| Obs used |
101 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
20.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-09-14T10:23:59.971200Z |
| Discovery magnitude (MPC) |
20.53 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-06-29.0000000 |
| e |
0.31447611 |
| q (au) |
3.413047 |
| a (au) |
4.978743 |
| i (deg) |
11.454347 |
| Ω (om, deg) |
272.968571 |
| ω (w, deg) |
82.307441 |
| M (ma, deg) |
2.828464 |
밝기
산란 + 전체 선형
$$
M_a = (9.349 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.349 |
| n |
6.000 |
| gf |
0.975 |
| gb |
-0.585 |
| k |
0.999 |
| δ90 |
9.589 |
| 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) |
| 2026-05-12 00:00 |
11:21:04.06 |
-09:33:11.9 |
HIP 55395 |
11.12 |
| 2026-05-12 12:00 |
11:21:00.97 |
-09:31:57.0 |
HIP 55395 |
11.62 |
| 2026-05-13 00:00 |
11:20:58.02 |
-09:30:42.7 |
HIP 55395 |
12.28 |
| 2026-05-13 12:00 |
11:20:55.22 |
-09:29:29.2 |
HIP 55395 |
13.07 |
| 2026-05-14 00:00 |
11:20:52.56 |
-09:28:16.4 |
HIP 55395 |
13.96 |
| 2026-05-14 12:00 |
11:20:50.04 |
-09:27:04.4 |
HIP 55395 |
14.92 |
| 2026-05-15 00:00 |
11:20:47.68 |
-09:25:53.1 |
HIP 55395 |
15.94 |
| 2026-05-15 12:00 |
11:20:45.45 |
-09:24:42.6 |
HIP 55395 |
16.99 |
| 2026-05-16 00:00 |
11:20:43.38 |
-09:23:32.9 |
HIP 55395 |
18.06 |
| 2026-05-16 12:00 |
11:20:41.45 |
-09:22:23.9 |
HIP 55395 |
19.15 |
| 2026-05-17 00:00 |
11:20:39.67 |
-09:21:15.7 |
HIP 55395 |
20.24 |
| 2026-05-17 12:00 |
11:20:38.03 |
-09:20:08.3 |
HIP 55395 |
21.34 |
| 2026-05-18 00:00 |
11:20:36.54 |
-09:19:01.7 |
HIP 55395 |
22.43 |
| 2026-05-18 12:00 |
11:20:35.19 |
-09:17:55.9 |
HIP 55395 |
23.52 |
| 2026-05-19 00:00 |
11:20:33.99 |
-09:16:50.9 |
HIP 55395 |
24.60 |
| 2026-05-19 12:00 |
11:20:32.94 |
-09:15:46.8 |
HIP 55364 |
24.43 |
| 2026-05-20 00:00 |
11:20:32.04 |
-09:14:43.4 |
HIP 55364 |
23.36 |
| 2026-05-20 12:00 |
11:20:31.28 |
-09:13:40.9 |
HIP 55364 |
22.30 |
| 2026-05-21 00:00 |
11:20:30.66 |
-09:12:39.2 |
HIP 55364 |
21.26 |
| 2026-05-21 12:00 |
11:20:30.19 |
-09:11:38.3 |
HIP 55364 |
20.24 |
| 2026-05-22 00:00 |
11:20:29.87 |
-09:10:38.3 |
HIP 55364 |
19.25 |
| 2026-05-22 12:00 |
11:20:29.69 |
-09:09:39.1 |
HIP 55364 |
18.28 |
| 2026-05-23 00:00 |
11:20:29.66 |
-09:08:40.8 |
HIP 55364 |
17.33 |
| 2026-05-23 12:00 |
11:20:29.77 |
-09:07:43.3 |
HIP 55364 |
16.41 |
| 2026-05-24 00:00 |
11:20:30.02 |
-09:06:46.7 |
HIP 55364 |
15.52 |
| 2026-05-24 12:00 |
11:20:30.42 |
-09:05:51.0 |
HIP 55364 |
14.66 |
| 2026-05-25 00:00 |
11:20:30.97 |
-09:04:56.1 |
HIP 55364 |
13.83 |
| 2026-05-25 12:00 |
11:20:31.65 |
-09:04:02.1 |
HIP 55364 |
13.04 |
| 2026-05-26 00:00 |
11:20:32.48 |
-09:03:08.9 |
HIP 55364 |
12.30 |
| 2026-05-26 12:00 |
11:20:33.46 |
-09:02:16.6 |
HIP 55364 |
11.61 |
| 2026-05-27 00:00 |
11:20:34.57 |
-09:01:25.2 |
HIP 55364 |
10.98 |
| 2026-05-27 12:00 |
11:20:35.83 |
-09:00:34.7 |
HIP 55364 |
10.43 |
| 2026-05-28 00:00 |
11:20:37.23 |
-08:59:45.1 |
HIP 55364 |
9.96 |
| 2026-05-28 12:00 |
11:20:38.77 |
-08:58:56.4 |
HIP 55364 |
9.58 |
| 2026-05-29 00:00 |
11:20:40.46 |
-08:58:08.5 |
HIP 55364 |
9.31 |
| 2026-05-29 12:00 |
11:20:42.28 |
-08:57:21.5 |
HIP 55364 |
9.15 |
| 2026-05-30 00:00 |
11:20:44.24 |
-08:56:35.5 |
HIP 55364 |
9.13 |
| 2026-05-30 12:00 |
11:20:46.35 |
-08:55:50.3 |
HIP 55364 |
9.23 |
| 2026-05-31 00:00 |
11:20:48.59 |
-08:55:06.0 |
HIP 55364 |
9.45 |
| 2026-05-31 12:00 |
11:20:50.98 |
-08:54:22.6 |
HIP 55364 |
9.80 |
| 2026-06-01 00:00 |
11:20:53.50 |
-08:53:40.1 |
HIP 55364 |
10.25 |
| 2026-06-01 12:00 |
11:20:56.17 |
-08:52:58.6 |
HIP 55364 |
10.81 |
| 2026-06-02 00:00 |
11:20:58.97 |
-08:52:17.9 |
HIP 55364 |
11.45 |