메타데이터
| 항목 |
값 |
| Designation |
C/2014 Q3 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-11-19T01:37:12.034560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
766 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
22.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-10-19.0000000 |
| e |
0.94206319 |
| q (au) |
1.647407 |
| a (au) |
28.434555 |
| i (deg) |
89.948878 |
| Ω (om, deg) |
63.129517 |
| ω (w, deg) |
47.380883 |
| M (ma, deg) |
359.798051 |
밝기
산란 + 전체 선형
$$
M_a = (13.028 + 2.018\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.028 |
| n |
2.018 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 2014-08-22 |
2014-11-18 |
+16.4094 |
-4.762 |
| 2014-11-19 |
2015-03-24 |
+26.2508 |
-7.298 |
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 |
15:25:59.90 |
-44:40:25.0 |
HIP 75557 |
11.73 |
| 2026-07-29 12:00 |
15:25:57.77 |
-44:39:54.7 |
HIP 75557 |
12.28 |
| 2026-07-30 00:00 |
15:25:55.71 |
-44:39:24.6 |
HIP 75557 |
12.82 |
| 2026-07-30 12:00 |
15:25:53.70 |
-44:38:54.5 |
HIP 75557 |
13.38 |
| 2026-07-31 00:00 |
15:25:51.74 |
-44:38:24.4 |
HIP 75557 |
13.93 |
| 2026-07-31 12:00 |
15:25:49.84 |
-44:37:54.5 |
HIP 75557 |
14.49 |
| 2026-08-01 00:00 |
15:25:48.00 |
-44:37:24.6 |
HIP 75557 |
15.04 |
| 2026-08-01 12:00 |
15:25:46.21 |
-44:36:54.8 |
HIP 75557 |
15.60 |
| 2026-08-02 00:00 |
15:25:44.48 |
-44:36:25.1 |
HIP 75557 |
16.15 |
| 2026-08-02 12:00 |
15:25:42.80 |
-44:35:55.5 |
HIP 75481 |
15.97 |
| 2026-08-03 00:00 |
15:25:41.18 |
-44:35:26.0 |
HIP 75481 |
15.41 |
| 2026-08-03 12:00 |
15:25:39.61 |
-44:34:56.5 |
HIP 75481 |
14.85 |
| 2026-08-04 00:00 |
15:25:38.11 |
-44:34:27.2 |
HIP 75481 |
14.30 |
| 2026-08-04 12:00 |
15:25:36.66 |
-44:33:57.9 |
HIP 75481 |
13.75 |
| 2026-08-05 00:00 |
15:25:35.26 |
-44:33:28.7 |
HIP 75481 |
13.21 |
| 2026-08-05 12:00 |
15:25:33.92 |
-44:32:59.7 |
HIP 75481 |
12.67 |
| 2026-08-06 00:00 |
15:25:32.64 |
-44:32:30.7 |
HIP 75481 |
12.14 |
| 2026-08-06 12:00 |
15:25:31.41 |
-44:32:01.9 |
HIP 75481 |
11.62 |
| 2026-08-07 00:00 |
15:25:30.24 |
-44:31:33.1 |
HIP 75481 |
11.10 |
| 2026-08-07 12:00 |
15:25:29.13 |
-44:31:04.5 |
HIP 75481 |
10.58 |
| 2026-08-08 00:00 |
15:25:28.07 |
-44:30:36.0 |
HIP 75481 |
10.07 |
| 2026-08-08 12:00 |
15:25:27.07 |
-44:30:07.6 |
HIP 75481 |
9.57 |
| 2026-08-09 00:00 |
15:25:26.13 |
-44:29:39.3 |
HIP 75481 |
9.06 |
| 2026-08-09 12:00 |
15:25:25.24 |
-44:29:11.2 |
HIP 75481 |
8.57 |
| 2026-08-10 00:00 |
15:25:24.41 |
-44:28:43.2 |
HIP 75481 |
8.08 |
| 2026-08-10 12:00 |
15:25:23.64 |
-44:28:15.3 |
HIP 75481 |
7.59 |
| 2026-08-11 00:00 |
15:25:22.92 |
-44:27:47.5 |
HIP 75481 |
7.12 |
| 2026-08-11 12:00 |
15:25:22.26 |
-44:27:19.8 |
HIP 75481 |
6.64 |
| 2026-08-12 00:00 |
15:25:21.65 |
-44:26:52.3 |
HIP 75481 |
6.17 |
| 2026-08-12 12:00 |
15:25:21.11 |
-44:26:25.0 |
HIP 75481 |
5.71 |
| 2026-08-13 00:00 |
15:25:20.62 |
-44:25:57.7 |
HIP 75481 |
5.26 |
| 2026-08-13 12:00 |
15:25:20.18 |
-44:25:30.6 |
HIP 75481 |
4.81 |
| 2026-08-14 00:00 |
15:25:19.80 |
-44:25:03.7 |
HIP 75481 |
4.37 |
| 2026-08-14 12:00 |
15:25:19.48 |
-44:24:36.9 |
HIP 75481 |
3.94 |
| 2026-08-15 00:00 |
15:25:19.22 |
-44:24:10.2 |
HIP 75481 |
3.52 |
| 2026-08-15 12:00 |
15:25:19.01 |
-44:23:43.7 |
HIP 75481 |
3.12 |
| 2026-08-16 00:00 |
15:25:18.86 |
-44:23:17.4 |
HIP 75481 |
2.74 |
| 2026-08-16 12:00 |
15:25:18.76 |
-44:22:51.2 |
HIP 75481 |
2.38 |
| 2026-08-17 00:00 |
15:25:18.72 |
-44:22:25.2 |
HIP 75481 |
2.07 |
| 2026-08-17 12:00 |
15:25:18.74 |
-44:21:59.3 |
HIP 75481 |
1.82 |
| 2026-08-18 00:00 |
15:25:18.81 |
-44:21:33.6 |
HIP 75481 |
1.66 |
| 2026-08-18 12:00 |
15:25:18.93 |
-44:21:08.1 |
HIP 75481 |
1.60 |
| 2026-08-19 00:00 |
15:25:19.12 |
-44:20:42.7 |
HIP 75481 |
1.67 |