메타데이터
| 항목 |
값 |
| Designation |
C/2019 O2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-04-07T19:41:36.176640Z |
| Orbit solution date (soln_date, UTC) |
2026-06-18T16:12:18Z |
| Obs used |
588 |
| 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) |
2021-06-09.0000000 |
| e |
0.83112325 |
| q (au) |
9.682779 |
| a (au) |
57.336367 |
| i (deg) |
93.288594 |
| Ω (om, deg) |
48.305899 |
| ω (w, deg) |
129.663434 |
| M (ma, deg) |
358.483932 |
밝기
산란 + 전체 선형
$$
M_a = (8.986 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.986 |
| n |
2.000 |
| gf |
0.967 |
| gb |
-0.504 |
| k |
1.000 |
| δ90 |
9.772 |
| 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) |
| 2026-07-29 00:00 |
14:46:39.91 |
-13:25:47.8 |
HIP 72209 |
21.71 |
| 2026-07-29 12:00 |
14:46:37.24 |
-13:26:44.0 |
HIP 72209 |
20.60 |
| 2026-07-30 00:00 |
14:46:34.66 |
-13:27:40.5 |
HIP 72209 |
19.50 |
| 2026-07-30 12:00 |
14:46:32.17 |
-13:28:37.2 |
HIP 72209 |
18.40 |
| 2026-07-31 00:00 |
14:46:29.76 |
-13:29:34.3 |
HIP 72209 |
17.31 |
| 2026-07-31 12:00 |
14:46:27.45 |
-13:30:31.7 |
HIP 72209 |
16.22 |
| 2026-08-01 00:00 |
14:46:25.22 |
-13:31:29.3 |
HIP 72209 |
15.14 |
| 2026-08-01 12:00 |
14:46:23.09 |
-13:32:27.3 |
HIP 72209 |
14.06 |
| 2026-08-02 00:00 |
14:46:21.04 |
-13:33:25.5 |
HIP 72209 |
12.99 |
| 2026-08-02 12:00 |
14:46:19.08 |
-13:34:24.0 |
HIP 72209 |
11.92 |
| 2026-08-03 00:00 |
14:46:17.21 |
-13:35:22.8 |
HIP 72209 |
10.86 |
| 2026-08-03 12:00 |
14:46:15.42 |
-13:36:21.9 |
HIP 72209 |
9.80 |
| 2026-08-04 00:00 |
14:46:13.73 |
-13:37:21.3 |
HIP 72209 |
8.75 |
| 2026-08-04 12:00 |
14:46:12.12 |
-13:38:21.0 |
HIP 72209 |
7.69 |
| 2026-08-05 00:00 |
14:46:10.60 |
-13:39:21.0 |
HIP 72209 |
6.65 |
| 2026-08-05 12:00 |
14:46:09.17 |
-13:40:21.2 |
HIP 72209 |
5.60 |
| 2026-08-06 00:00 |
14:46:07.82 |
-13:41:21.8 |
HIP 72209 |
4.57 |
| 2026-08-06 12:00 |
14:46:06.57 |
-13:42:22.6 |
HIP 72209 |
3.54 |
| 2026-08-07 00:00 |
14:46:05.40 |
-13:43:23.7 |
HIP 72209 |
2.53 |
| 2026-08-07 12:00 |
14:46:04.31 |
-13:44:25.1 |
HIP 72209 |
1.57 |
| 2026-08-08 00:00 |
14:46:03.32 |
-13:45:26.8 |
HIP 72209 |
0.86 |
| 2026-08-08 12:00 |
14:46:02.41 |
-13:46:28.7 |
HIP 72209 |
1.10 |
| 2026-08-09 00:00 |
14:46:01.59 |
-13:47:31.0 |
HIP 72209 |
1.97 |
| 2026-08-09 12:00 |
14:46:00.85 |
-13:48:33.5 |
HIP 72209 |
2.95 |
| 2026-08-10 00:00 |
14:46:00.20 |
-13:49:36.3 |
HIP 72209 |
3.98 |
| 2026-08-10 12:00 |
14:45:59.64 |
-13:50:39.3 |
HIP 72209 |
5.01 |
| 2026-08-11 00:00 |
14:45:59.16 |
-13:51:42.7 |
HIP 72209 |
6.05 |
| 2026-08-11 12:00 |
14:45:58.77 |
-13:52:46.3 |
HIP 72209 |
7.10 |
| 2026-08-12 00:00 |
14:45:58.46 |
-13:53:50.2 |
HIP 72209 |
8.15 |
| 2026-08-12 12:00 |
14:45:58.24 |
-13:54:54.4 |
HIP 72209 |
9.20 |
| 2026-08-13 00:00 |
14:45:58.11 |
-13:55:58.8 |
HIP 72209 |
10.26 |
| 2026-08-13 12:00 |
14:45:58.06 |
-13:57:03.6 |
HIP 72209 |
11.32 |
| 2026-08-14 00:00 |
14:45:58.09 |
-13:58:08.6 |
HIP 72209 |
12.39 |
| 2026-08-14 12:00 |
14:45:58.21 |
-13:59:13.8 |
HIP 72209 |
13.46 |
| 2026-08-15 00:00 |
14:45:58.42 |
-14:00:19.3 |
HIP 72209 |
14.54 |
| 2026-08-15 12:00 |
14:45:58.70 |
-14:01:25.1 |
HIP 72209 |
15.61 |
| 2026-08-16 00:00 |
14:45:59.07 |
-14:02:31.2 |
HIP 72209 |
16.70 |
| 2026-08-16 12:00 |
14:45:59.53 |
-14:03:37.5 |
HIP 72209 |
17.79 |
| 2026-08-17 00:00 |
14:46:00.06 |
-14:04:44.1 |
HIP 72209 |
18.88 |
| 2026-08-17 12:00 |
14:46:00.68 |
-14:05:50.9 |
HIP 72209 |
19.98 |
| 2026-08-18 00:00 |
14:46:01.38 |
-14:06:58.0 |
HIP 72209 |
21.09 |
| 2026-08-18 12:00 |
14:46:02.16 |
-14:08:05.3 |
HIP 72090 |
21.80 |
| 2026-08-19 00:00 |
14:46:03.02 |
-14:09:12.9 |
HIP 72090 |
21.29 |