메타데이터
| 항목 |
값 |
| Designation |
C/2019 O2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-04-07T19:35:10.979520Z |
| Orbit solution date (soln_date, UTC) |
2026-05-08T13:42:10Z |
| Obs used |
577 |
| NEO |
- |
| M1 |
10.200 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-07-24T12:32:27.456000Z |
| Discovery magnitude (MPC) |
20.50 i |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-06-04.0000000 |
| e |
0.83112178 |
| q (au) |
9.682788 |
| a (au) |
57.335919 |
| i (deg) |
93.288518 |
| Ω (om, deg) |
48.306286 |
| ω (w, deg) |
129.663235 |
| M (ma, deg) |
358.472574 |
밝기
산란 + 전체 선형
$$
M_a = (8.977 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.977 |
| n |
2.000 |
| gf |
0.995 |
| gb |
-0.823 |
| k |
1.000 |
| δ90 |
9.999 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
15:09:40.80 |
-11:58:19.6 |
HIP 74127 |
15.33 |
| 2026-05-12 12:00 |
15:09:28.04 |
-11:58:35.8 |
HIP 74127 |
13.55 |
| 2026-05-13 00:00 |
15:09:15.29 |
-11:58:52.0 |
HIP 74127 |
12.31 |
| 2026-05-13 12:00 |
15:09:02.55 |
-11:59:08.5 |
HIP 74127 |
11.80 |
| 2026-05-14 00:00 |
15:08:49.81 |
-11:59:25.0 |
HIP 74059 |
11.21 |
| 2026-05-14 12:00 |
15:08:37.09 |
-11:59:41.6 |
HIP 74059 |
8.21 |
| 2026-05-15 00:00 |
15:08:24.37 |
-11:59:58.4 |
HIP 74059 |
5.36 |
| 2026-05-15 12:00 |
15:08:11.67 |
-12:00:15.3 |
HIP 74059 |
3.09 |
| 2026-05-16 00:00 |
15:07:58.97 |
-12:00:32.4 |
HIP 74059 |
3.13 |
| 2026-05-16 12:00 |
15:07:46.29 |
-12:00:49.6 |
HIP 74059 |
5.43 |
| 2026-05-17 00:00 |
15:07:33.63 |
-12:01:06.9 |
HIP 74059 |
8.27 |
| 2026-05-17 12:00 |
15:07:20.98 |
-12:01:24.3 |
HIP 74059 |
11.25 |
| 2026-05-18 00:00 |
15:07:08.35 |
-12:01:41.9 |
HIP 74059 |
14.28 |
| 2026-05-18 12:00 |
15:06:55.74 |
-12:01:59.7 |
HIP 74059 |
17.33 |
| 2026-05-19 00:00 |
15:06:43.14 |
-12:02:17.6 |
HIP 74059 |
20.39 |
| 2026-05-19 12:00 |
15:06:30.57 |
-12:02:35.7 |
HIP 74059 |
23.46 |
| 2026-05-20 00:00 |
15:06:18.02 |
-12:02:53.9 |
HIP 74059 |
26.52 |
| 2026-05-20 12:00 |
15:06:05.49 |
-12:03:12.3 |
HIP 73794 |
26.49 |
| 2026-05-21 00:00 |
15:05:52.99 |
-12:03:30.8 |
HIP 73794 |
24.41 |
| 2026-05-21 12:00 |
15:05:40.51 |
-12:03:49.6 |
HIP 73794 |
22.57 |
| 2026-05-22 00:00 |
15:05:28.05 |
-12:04:08.4 |
HIP 73794 |
21.01 |
| 2026-05-22 12:00 |
15:05:15.62 |
-12:04:27.5 |
HIP 73794 |
19.80 |
| 2026-05-23 00:00 |
15:05:03.22 |
-12:04:46.7 |
HIP 73794 |
19.01 |
| 2026-05-23 12:00 |
15:04:50.85 |
-12:05:06.1 |
HIP 73794 |
18.69 |
| 2026-05-24 00:00 |
15:04:38.51 |
-12:05:25.7 |
HIP 73794 |
18.85 |
| 2026-05-24 12:00 |
15:04:26.20 |
-12:05:45.4 |
HIP 73794 |
19.48 |
| 2026-05-25 00:00 |
15:04:13.93 |
-12:06:05.4 |
HIP 73794 |
20.54 |
| 2026-05-25 12:00 |
15:04:01.68 |
-12:06:25.5 |
HIP 73794 |
21.95 |
| 2026-05-26 00:00 |
15:03:49.47 |
-12:06:45.8 |
HIP 73794 |
23.66 |
| 2026-05-26 12:00 |
15:03:37.29 |
-12:07:06.3 |
HIP 73594 |
23.63 |
| 2026-05-27 00:00 |
15:03:25.15 |
-12:07:27.0 |
HIP 73594 |
21.50 |
| 2026-05-27 12:00 |
15:03:13.05 |
-12:07:47.9 |
HIP 73594 |
19.60 |
| 2026-05-28 00:00 |
15:03:00.98 |
-12:08:09.0 |
HIP 73594 |
18.00 |
| 2026-05-28 12:00 |
15:02:48.95 |
-12:08:30.2 |
HIP 73594 |
16.77 |
| 2026-05-29 00:00 |
15:02:36.96 |
-12:08:51.7 |
HIP 73594 |
16.00 |
| 2026-05-29 12:00 |
15:02:25.01 |
-12:09:13.4 |
HIP 73594 |
15.74 |
| 2026-05-30 00:00 |
15:02:13.10 |
-12:09:35.3 |
HIP 73594 |
16.03 |
| 2026-05-30 12:00 |
15:02:01.24 |
-12:09:57.4 |
HIP 73594 |
16.82 |
| 2026-05-31 00:00 |
15:01:49.41 |
-12:10:19.6 |
HIP 73594 |
18.05 |
| 2026-05-31 12:00 |
15:01:37.63 |
-12:10:42.1 |
HIP 73594 |
19.62 |
| 2026-06-01 00:00 |
15:01:25.90 |
-12:11:04.9 |
HIP 73444 |
20.76 |
| 2026-06-01 12:00 |
15:01:14.21 |
-12:11:27.8 |
HIP 73444 |
18.73 |
| 2026-06-02 00:00 |
15:01:02.56 |
-12:11:50.9 |
HIP 73444 |
16.94 |