메타데이터
| 항목 |
값 |
| Designation |
C/1993 Y1 (McNaught-Russell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-03-31T02:18:06.736320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
377 |
| NEO |
- |
| M1 |
12.300 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1994-04-28.0000000 |
| e |
0.99355692 |
| q (au) |
0.867635 |
| a (au) |
134.661517 |
| i (deg) |
51.586469 |
| Ω (om, deg) |
166.359073 |
| ω (w, deg) |
353.467558 |
| M (ma, deg) |
0.017600 |
밝기
산란 + 전체 선형
$$
M_a = (9.244 + 4.880\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.244 |
| n |
4.880 |
| gf |
0.800 |
| gb |
-0.500 |
| 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 |
| 1993-12-17 |
1994-03-02 |
+18.4445 |
-0.750 |
| 1994-03-02 |
1994-03-31 |
-10.7206 |
-0.342 |
| 1994-03-31 |
1994-06-09 |
-1.1734 |
-0.051 |
| 1994-06-09 |
1994-10-02 |
+5.2847 |
-0.850 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
21:59:21.72 |
+04:10:02.9 |
HIP 108473 |
26.91 |
| 2026-09-20 12:00 |
21:59:19.95 |
+04:09:48.1 |
HIP 108473 |
26.48 |
| 2026-09-21 00:00 |
21:59:18.19 |
+04:09:33.4 |
HIP 108473 |
26.05 |
| 2026-09-21 12:00 |
21:59:16.44 |
+04:09:18.6 |
HIP 108473 |
25.63 |
| 2026-09-22 00:00 |
21:59:14.70 |
+04:09:03.8 |
HIP 108473 |
25.21 |
| 2026-09-22 12:00 |
21:59:12.97 |
+04:08:48.9 |
HIP 108473 |
24.79 |
| 2026-09-23 00:00 |
21:59:11.25 |
+04:08:34.1 |
HIP 108473 |
24.38 |
| 2026-09-23 12:00 |
21:59:09.54 |
+04:08:19.2 |
HIP 108473 |
23.97 |
| 2026-09-24 00:00 |
21:59:07.84 |
+04:08:04.4 |
HIP 108473 |
23.57 |
| 2026-09-24 12:00 |
21:59:06.15 |
+04:07:49.5 |
HIP 108473 |
23.17 |
| 2026-09-25 00:00 |
21:59:04.47 |
+04:07:34.6 |
HIP 108473 |
22.78 |
| 2026-09-25 12:00 |
21:59:02.81 |
+04:07:19.7 |
HIP 108473 |
22.39 |
| 2026-09-26 00:00 |
21:59:01.15 |
+04:07:04.8 |
HIP 108473 |
22.00 |
| 2026-09-26 12:00 |
21:58:59.50 |
+04:06:49.8 |
HIP 108473 |
21.62 |
| 2026-09-27 00:00 |
21:58:57.86 |
+04:06:34.9 |
HIP 108473 |
21.24 |
| 2026-09-27 12:00 |
21:58:56.24 |
+04:06:20.0 |
HIP 108473 |
20.87 |
| 2026-09-28 00:00 |
21:58:54.62 |
+04:06:05.0 |
HIP 108473 |
20.51 |
| 2026-09-28 12:00 |
21:58:53.02 |
+04:05:50.1 |
HIP 108473 |
20.15 |
| 2026-09-29 00:00 |
21:58:51.42 |
+04:05:35.1 |
HIP 108473 |
19.79 |
| 2026-09-29 12:00 |
21:58:49.84 |
+04:05:20.1 |
HIP 108473 |
19.44 |
| 2026-09-30 00:00 |
21:58:48.27 |
+04:05:05.2 |
HIP 108473 |
19.10 |
| 2026-09-30 12:00 |
21:58:46.72 |
+04:04:50.2 |
HIP 108473 |
18.76 |
| 2026-10-01 00:00 |
21:58:45.17 |
+04:04:35.2 |
HIP 108473 |
18.42 |
| 2026-10-01 12:00 |
21:58:43.64 |
+04:04:20.3 |
HIP 108473 |
18.10 |
| 2026-10-02 00:00 |
21:58:42.11 |
+04:04:05.3 |
HIP 108473 |
17.78 |
| 2026-10-02 12:00 |
21:58:40.60 |
+04:03:50.4 |
HIP 108473 |
17.47 |
| 2026-10-03 00:00 |
21:58:39.11 |
+04:03:35.4 |
HIP 108473 |
17.16 |
| 2026-10-03 12:00 |
21:58:37.62 |
+04:03:20.5 |
HIP 108473 |
16.86 |
| 2026-10-04 00:00 |
21:58:36.15 |
+04:03:05.5 |
HIP 108473 |
16.57 |
| 2026-10-04 12:00 |
21:58:34.69 |
+04:02:50.6 |
HIP 108473 |
16.28 |
| 2026-10-05 00:00 |
21:58:33.24 |
+04:02:35.7 |
HIP 108473 |
16.00 |
| 2026-10-05 12:00 |
21:58:31.80 |
+04:02:20.7 |
HIP 108473 |
15.73 |
| 2026-10-06 00:00 |
21:58:30.38 |
+04:02:05.8 |
HIP 108473 |
15.47 |
| 2026-10-06 12:00 |
21:58:28.97 |
+04:01:50.9 |
HIP 108473 |
15.22 |
| 2026-10-07 00:00 |
21:58:27.58 |
+04:01:36.1 |
HIP 108473 |
14.97 |
| 2026-10-07 12:00 |
21:58:26.20 |
+04:01:21.2 |
HIP 108473 |
14.73 |
| 2026-10-08 00:00 |
21:58:24.83 |
+04:01:06.4 |
HIP 108473 |
14.50 |
| 2026-10-08 12:00 |
21:58:23.48 |
+04:00:51.5 |
HIP 108473 |
14.28 |
| 2026-10-09 00:00 |
21:58:22.13 |
+04:00:36.7 |
HIP 108473 |
14.07 |
| 2026-10-09 12:00 |
21:58:20.81 |
+04:00:21.9 |
HIP 108473 |
13.87 |
| 2026-10-10 00:00 |
21:58:19.50 |
+04:00:07.2 |
HIP 108473 |
13.67 |
| 2026-10-10 12:00 |
21:58:18.20 |
+03:59:52.4 |
HIP 108473 |
13.49 |
| 2026-10-11 00:00 |
21:58:16.91 |
+03:59:37.7 |
HIP 108473 |
13.31 |