메타데이터
| 항목 |
값 |
| Designation |
C/2014 R1 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-11-19T05:45:38.039040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
523 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
13.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-01-09.0000000 |
| e |
0.99249938 |
| q (au) |
1.345431 |
| a (au) |
179.376061 |
| i (deg) |
9.932908 |
| Ω (om, deg) |
104.051786 |
| ω (w, deg) |
55.649107 |
| M (ma, deg) |
0.020825 |
밝기
산란 + 전체 선형
$$
M_a = (9.468 + 5.229\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.468 |
| n |
5.229 |
| gf |
1.000 |
| gb |
-0.935 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2014-09-05 |
2014-11-18 |
+15.2936 |
-3.191 |
| 2014-11-19 |
2015-08-06 |
+3.9121 |
-1.721 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
21:22:47.85 |
-20:41:40.9 |
HIP 105665 |
21.30 |
| 2026-05-12 12:00 |
21:22:47.92 |
-20:41:47.3 |
HIP 105665 |
21.24 |
| 2026-05-13 00:00 |
21:22:47.96 |
-20:41:53.9 |
HIP 105665 |
21.18 |
| 2026-05-13 12:00 |
21:22:47.95 |
-20:42:00.6 |
HIP 105665 |
21.14 |
| 2026-05-14 00:00 |
21:22:47.91 |
-20:42:07.5 |
HIP 105665 |
21.10 |
| 2026-05-14 12:00 |
21:22:47.83 |
-20:42:14.6 |
HIP 105665 |
21.06 |
| 2026-05-15 00:00 |
21:22:47.72 |
-20:42:21.8 |
HIP 105665 |
21.04 |
| 2026-05-15 12:00 |
21:22:47.56 |
-20:42:29.2 |
HIP 105665 |
21.02 |
| 2026-05-16 00:00 |
21:22:47.37 |
-20:42:36.8 |
HIP 105665 |
21.01 |
| 2026-05-16 12:00 |
21:22:47.14 |
-20:42:44.6 |
HIP 105665 |
21.01 |
| 2026-05-17 00:00 |
21:22:46.87 |
-20:42:52.5 |
HIP 105665 |
21.01 |
| 2026-05-17 12:00 |
21:22:46.56 |
-20:43:00.6 |
HIP 105665 |
21.02 |
| 2026-05-18 00:00 |
21:22:46.22 |
-20:43:08.9 |
HIP 105665 |
21.05 |
| 2026-05-18 12:00 |
21:22:45.83 |
-20:43:17.3 |
HIP 105665 |
21.08 |
| 2026-05-19 00:00 |
21:22:45.41 |
-20:43:25.9 |
HIP 105665 |
21.12 |
| 2026-05-19 12:00 |
21:22:44.95 |
-20:43:34.6 |
HIP 105665 |
21.16 |
| 2026-05-20 00:00 |
21:22:44.46 |
-20:43:43.6 |
HIP 105665 |
21.22 |
| 2026-05-20 12:00 |
21:22:43.92 |
-20:43:52.7 |
HIP 105665 |
21.28 |
| 2026-05-21 00:00 |
21:22:43.35 |
-20:44:01.9 |
HIP 105665 |
21.36 |
| 2026-05-21 12:00 |
21:22:42.74 |
-20:44:11.3 |
HIP 105665 |
21.44 |
| 2026-05-22 00:00 |
21:22:42.09 |
-20:44:20.9 |
HIP 105665 |
21.53 |
| 2026-05-22 12:00 |
21:22:41.41 |
-20:44:30.6 |
HIP 105665 |
21.64 |
| 2026-05-23 00:00 |
21:22:40.69 |
-20:44:40.5 |
HIP 105665 |
21.75 |
| 2026-05-23 12:00 |
21:22:39.93 |
-20:44:50.6 |
HIP 105665 |
21.87 |
| 2026-05-24 00:00 |
21:22:39.13 |
-20:45:00.8 |
HIP 105665 |
22.00 |
| 2026-05-24 12:00 |
21:22:38.30 |
-20:45:11.1 |
HIP 105665 |
22.14 |
| 2026-05-25 00:00 |
21:22:37.43 |
-20:45:21.7 |
HIP 105665 |
22.29 |
| 2026-05-25 12:00 |
21:22:36.52 |
-20:45:32.3 |
HIP 105410 |
22.14 |
| 2026-05-26 00:00 |
21:22:35.58 |
-20:45:43.2 |
HIP 105410 |
21.89 |
| 2026-05-26 12:00 |
21:22:34.60 |
-20:45:54.2 |
HIP 105410 |
21.64 |
| 2026-05-27 00:00 |
21:22:33.58 |
-20:46:05.3 |
HIP 105410 |
21.37 |
| 2026-05-27 12:00 |
21:22:32.52 |
-20:46:16.6 |
HIP 105410 |
21.10 |
| 2026-05-28 00:00 |
21:22:31.43 |
-20:46:28.0 |
HIP 105410 |
20.82 |
| 2026-05-28 12:00 |
21:22:30.30 |
-20:46:39.6 |
HIP 105410 |
20.54 |
| 2026-05-29 00:00 |
21:22:29.14 |
-20:46:51.4 |
HIP 105410 |
20.24 |
| 2026-05-29 12:00 |
21:22:27.94 |
-20:47:03.3 |
HIP 105410 |
19.94 |
| 2026-05-30 00:00 |
21:22:26.70 |
-20:47:15.3 |
HIP 105410 |
19.63 |
| 2026-05-30 12:00 |
21:22:25.43 |
-20:47:27.5 |
HIP 105410 |
19.32 |
| 2026-05-31 00:00 |
21:22:24.12 |
-20:47:39.8 |
HIP 105410 |
18.99 |
| 2026-05-31 12:00 |
21:22:22.78 |
-20:47:52.3 |
HIP 105410 |
18.66 |
| 2026-06-01 00:00 |
21:22:21.40 |
-20:48:04.9 |
HIP 105410 |
18.33 |
| 2026-06-01 12:00 |
21:22:19.98 |
-20:48:17.7 |
HIP 105410 |
17.98 |
| 2026-06-02 00:00 |
21:22:18.53 |
-20:48:30.6 |
HIP 105410 |
17.63 |