메타데이터
| 항목 |
값 |
| Designation |
C/2019 B3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-01-20T04:27:17.818560Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:17Z |
| Obs used |
293 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
8.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-01-24T13:55:58.656000Z |
| Discovery magnitude (MPC) |
19.60 i |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-06-17.0000000 |
| e |
1.00210415 |
| q (au) |
6.823022 |
| a (au) |
-3242.642558 |
| i (deg) |
66.536192 |
| Ω (om, deg) |
358.432372 |
| ω (w, deg) |
263.923054 |
| M (ma, deg) |
0.000789 |
밝기
산란 + 전체 선형
$$
M_a = (3.014 + 4.873\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.014 |
| n |
4.873 |
| gf |
0.911 |
| gb |
-0.565 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-01-24 |
2020-11-22 |
+7.1897 |
-6.267 |
| 2021-01-29 |
2022-11-05 |
-12.7161 |
+10.938 |
| 2022-11-05 |
2023-10-18 |
+29.4531 |
-27.381 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
00:06:57.73 |
-04:18:58.9 |
HIP 556 |
3.36 |
| 2026-07-29 12:00 |
00:06:53.05 |
-04:19:03.1 |
HIP 556 |
2.46 |
| 2026-07-30 00:00 |
00:06:48.31 |
-04:19:07.7 |
HIP 556 |
1.89 |
| 2026-07-30 12:00 |
00:06:43.50 |
-04:19:12.5 |
HIP 556 |
1.98 |
| 2026-07-31 00:00 |
00:06:38.64 |
-04:19:17.7 |
HIP 556 |
2.67 |
| 2026-07-31 12:00 |
00:06:33.73 |
-04:19:23.1 |
HIP 556 |
3.66 |
| 2026-08-01 00:00 |
00:06:28.75 |
-04:19:28.8 |
HIP 556 |
4.78 |
| 2026-08-01 12:00 |
00:06:23.71 |
-04:19:34.9 |
HIP 556 |
5.96 |
| 2026-08-02 00:00 |
00:06:18.62 |
-04:19:41.2 |
HIP 556 |
7.18 |
| 2026-08-02 12:00 |
00:06:13.47 |
-04:19:47.9 |
HIP 556 |
8.43 |
| 2026-08-03 00:00 |
00:06:08.27 |
-04:19:54.8 |
HIP 556 |
9.70 |
| 2026-08-03 12:00 |
00:06:03.00 |
-04:20:02.0 |
HIP 556 |
10.99 |
| 2026-08-04 00:00 |
00:05:57.68 |
-04:20:09.5 |
HIP 556 |
12.31 |
| 2026-08-04 12:00 |
00:05:52.31 |
-04:20:17.3 |
HIP 556 |
13.64 |
| 2026-08-05 00:00 |
00:05:46.88 |
-04:20:25.3 |
HIP 556 |
14.98 |
| 2026-08-05 12:00 |
00:05:41.39 |
-04:20:33.6 |
HIP 556 |
16.35 |
| 2026-08-06 00:00 |
00:05:35.85 |
-04:20:42.2 |
HIP 556 |
17.72 |
| 2026-08-06 12:00 |
00:05:30.25 |
-04:20:51.1 |
HIP 556 |
19.12 |
| 2026-08-07 00:00 |
00:05:24.60 |
-04:21:00.3 |
HIP 556 |
20.52 |
| 2026-08-07 12:00 |
00:05:18.90 |
-04:21:09.7 |
HIP 556 |
21.95 |
| 2026-08-08 00:00 |
00:05:13.14 |
-04:21:19.4 |
HIP 556 |
23.38 |
| 2026-08-08 12:00 |
00:05:07.33 |
-04:21:29.3 |
HIP 556 |
24.84 |
| 2026-08-09 00:00 |
00:05:01.46 |
-04:21:39.5 |
HIP 556 |
26.30 |
| 2026-08-09 12:00 |
00:04:55.55 |
-04:21:49.9 |
HIP 267 |
27.07 |
| 2026-08-10 00:00 |
00:04:49.58 |
-04:22:00.6 |
HIP 267 |
25.87 |
| 2026-08-10 12:00 |
00:04:43.56 |
-04:22:11.6 |
HIP 267 |
24.69 |
| 2026-08-11 00:00 |
00:04:37.49 |
-04:22:22.8 |
HIP 267 |
23.54 |
| 2026-08-11 12:00 |
00:04:31.36 |
-04:22:34.2 |
HIP 267 |
22.43 |
| 2026-08-12 00:00 |
00:04:25.19 |
-04:22:45.9 |
HIP 267 |
21.37 |
| 2026-08-12 12:00 |
00:04:18.97 |
-04:22:57.8 |
HIP 267 |
20.36 |
| 2026-08-13 00:00 |
00:04:12.70 |
-04:23:09.9 |
HIP 267 |
19.43 |
| 2026-08-13 12:00 |
00:04:06.38 |
-04:23:22.3 |
HIP 267 |
18.57 |
| 2026-08-14 00:00 |
00:04:00.01 |
-04:23:34.9 |
HIP 267 |
17.81 |
| 2026-08-14 12:00 |
00:03:53.60 |
-04:23:47.7 |
HIP 267 |
17.16 |
| 2026-08-15 00:00 |
00:03:47.14 |
-04:24:00.7 |
HIP 267 |
16.65 |
| 2026-08-15 12:00 |
00:03:40.63 |
-04:24:13.9 |
HIP 267 |
16.28 |
| 2026-08-16 00:00 |
00:03:34.07 |
-04:24:27.3 |
HIP 267 |
16.07 |
| 2026-08-16 12:00 |
00:03:27.47 |
-04:24:41.0 |
HIP 267 |
16.03 |
| 2026-08-17 00:00 |
00:03:20.83 |
-04:24:54.8 |
HIP 267 |
16.17 |
| 2026-08-17 12:00 |
00:03:14.14 |
-04:25:08.8 |
HIP 267 |
16.48 |
| 2026-08-18 00:00 |
00:03:07.40 |
-04:25:23.1 |
HIP 267 |
16.96 |
| 2026-08-18 12:00 |
00:03:00.63 |
-04:25:37.5 |
HIP 267 |
17.59 |
| 2026-08-19 00:00 |
00:02:53.81 |
-04:25:52.1 |
HIP 267 |
18.37 |